Note: The script below is from the author at Manpollo.org
and other
site (on this second site, the author asks for help translating
the topics to Spanish for DVDs, etc.) The script doesn't correspond
100% to the video and still needs checking over.
“Patching Holes #1”
Okay. . . Who’s got all the answers? Who likes being called names?
Who’s all for a civil and reasoned debate? Great.
You know that “bitter debate” I mentioned in “The Most Terrifying
Video You’ll Ever See?” Yeah. I don’t like being called names.
I’m just this guy, see, sincerely trying to do what I can to bring
about the greatest good for the greatest number. I mean, I know
I asked for pointers where I’m wrong, but, geez, folks, do we
have to be so nasty about it?
On Digg dot com, I even got called a condescending douche. So
I was getting pretty down on myself. So, in an attempt to counteract
both of those point, I’m going to wear silly hats for the remainder
of this video.
I started addressing critiques singly, but quickly became overwhelmed,
so here’s what I’d like to do. Now that I’ve got your attention,
we can take some time to add back in some of the complexity that
got smoothed over in the original video. So over the next few
days, I’ll try to put together some videos to address the most
common “holes” in the argument that have been gleefully poked.
Objections such as:
Say, isn’t that just Pascal’s Wager all dressed up?
There are actually infinite possible columns in between these
extremes--what about those?
What if GCC is true, but it’s not human-caused, or we can’t do
anything about it? What about that row?
The depression in this box could very well bring about all the
stuff down here, making it just as bad, so the best bet is column
B.
Shouldn’t global economic depression be in this box as well as
this one, therefore making column B a better bet?
It’s deceptive because each box is equally-sized, implying equal
probability.
I’ll try to get to those in the next few days as I have time
and energy. If you share any of those objections and are curious
as to my fixes, here’s a tip to see them sooner: I’m a big boy,
but I tend to have more energy for responding if you’re not mean.
Gotta assign probabilities and numerical consequences. Given
that this is a possibility, shouldn’t our best and brightest be
evaluating this with all possible speed and resources?
If you disagree that it even merits such consideration, then
here I’m going to venture into more inflamatory territory, and
give you my take on the probabilities. Let me preface this by
saying that I spend pretty much all of my time thinking about
the nature of knowledge and how we know what we think we know.
Not so much from a philosophical thinker’s standpoint, but from
a process of science standpoint.
A big problem here is most people misunderstand the nature of
science. It is tentative. The law of gravity is still being questioned
to this day. Yet we use it, because it is the best that we’ve
got. It is the closest we’ve got to an understanding of the nature
of the universe. How do we know it is the best? Because it has
been the most accurate in making predictions that we could test.
Science isn’t certain. We cannot know reality. Every scientific
statement essentially comes with error bars--a statement of how
confidant we are of that measurement or statement. One of the
hallmarks of science--and the reason for it’s amazing effectiveness--is
that it is self critical. This manifests in the peer-review process.
It’s not perfect, it has made errors, and the results should not
be taken as the “truth.”
There will always be dissenters. And just because they are outnumbered
doesn’t mean they were wrong. Tons of examples. In fact, almost
all science that has gone before us has turned out to be wrong.
Good thing, too, or we would be stuck with 100-year-old science!
Science makes observations, looks for patterns, builds models
based on those patterns, makes predictions based on those models,
and then tests the predictions with observations.
In climate science, you hear a lot about “computer models.” Why
pay attention to what they predict about the future? Because they
have been tested to see if they can reproduce the climate we’ve
already seen. There have been a ton of them, and the best ones
survive and are made better. In short, why believe what a computer
spits out? Because it has worked before. But not just any computer,
and not just any output--only the ones with a solid track record.
How to reconcile dissenters? Wait. The truth will out. The problem
here is, the situation may not tolerate waiting. So you have to
balance that, and perhaps make the best decision you can with
the information you have. Because, really, that is all that science
has ever done. We never get “the answer.” But we do get “the best
answer we have so far.”
Extraordinary claims require extraordinary proof. At this point,
so much peer-reviewed science has supported the two propositions
that:
1) the globe is warming, and
2) we’re the ones doing it,
that any serious dissenters who would like to have their answers
considered “the best we’ve got so far” would need to have a comprehensive,
well-established, peer-reviewed.
There is no consensus. I’ll let you in on a secret: you’re right!
There is no consensus in the scientific community about climate
change. But here’s the kicker: there is never consensus in science.
And that’s because science is self-critical. Science says: “I
want to know reality as well as I can, but I’m human and can make
mistakes. So please, find the weak spot in my argument so I can
fix it.” Science welcomes criticism! Why? Because that’s how it
gets a better answer.
Pick the most well-established Law of Science you can think of.
You probably thought of the Law of Gravity. Know what? There is
no consensus! We’ve still got serious scientists testing it. They
think it is highly likely to be true, but there is a satellite
in orbit right now that is designed to observe whether are current
Law of Gravity makes correct predictions. It’s the most hallowed
law in science, and we’re still trying to break it! [MOND]
So what do you and I, as non-scientists do with that? We stop
looking for certainty. Because science can’t provide it. Instead,
we must tolerate some uncertainty, and go about our lives with
information that we know to be incomplete.
If you object that AGCC is controversial or speculative in the
scientific community, I would ask: what would it look like when
we got a solid enough answer for you? Describe it. What would
the test be for “good enough to go on”? When no one disagrees?
Well, by that, don’t bet on the fact we’ve got a moon, because
there are very convinced people who disagree with that, and they’ll
present lots of evidence. How about: let’s take a poll. Reality
by democracy? Who gets to vote? Only those with relevant degrees?
Who decides what constitutes a relevant degree?
If a large panel of scientists in the field, looking at a large
body of peer-reviewed evidence over a long period of time, with
the make-up of the panel changing over time, making a quantitative
statment that puts the probability at 90% doesn’t do it for you,
then what would? It’s a serious question. What would be good enough?
How about this: I read a bunch of lay-science literature, stuff
like Science News and Scientific American. Respected stuff that
reports to the scientifically literate public what they heavyweights
are publishing in the technical journals. And global climate change
is no longer ever qualified by “purported climate change,” or
“the possibility of global warming.” When mentioned, it’s just
a given. What I take from that is, the people who do this for
a living have decided that it’s just not worth wasting breath
over whether it’s happening or not. They’ve gotten their “good
enough” answer, and are moving on with it.
So here are some common objections to my treatment of the issue.
So how do you decide what to believe in the physical world (science)?
I’ll tell you how I do it. I evaluate the source--how credible,
what stake, what track record. Science, NAS, AAAS, professional
associations. Does that mean it’s true? No! It means I weight
it more than if I read it on someone’s blog or heard it from a
friend.
So what would I decide on if it were up to me? I wouldn’t. I
would hire a bunch of people way smarter than me, have them work
on it as fast as possible. Then I’d have them explain to me how
they got their conclusions, and then I’d make the call. Isn’t
that what we should be asking for? Since climate change can’t
be dismissed out of hand, don’t we deserve that?
Please don’t be content with a hit-and-run, whether you’re the
victim OR the driver.
If you don’t believe me (which you shouldn’t--I’m just a random
guy on the internet as far as you know), and you don’t believe
a large body of specialists, then who do you believe? Ask yourself
“What would it take for me to believe it’s probable enough to
act on?” If you can’t come up with a reasonable answer. Then think
of this: isn’t that evidence that your opinion is not based on
evidence or experience, but on something else? That is, if you
can imagine no evidence which would change your mind, then why
do you trust the answer that your opinion is giving you?
How do you go about deciding what to believe when hearing opposite
things from people with letters after their names?
. . .”expected value,” a well-established procedure in probability
theory that--while flawed--still allows casinos and insurance
companies to commit to paying huge amounts at unpredictable intervals,
yet still be confidant of making a profit.
I know I said “tell me where I’m wrong,” but I also said “do
this yourself.” It does all of us (you, me, and the rest of humanity)
a disservice to point out an omission in this simplified grid,
and then move on with the feeling that you’ve discredited it,
and needn’t concern yourself with it any further. Grab a pencil
and paper, and put the omissions back in there. Don’t you owe
yourself that? Don’t we all deserve the most well-considered arguments
we can possibly get? Catastrophic AGCC cannot be dismissed out
of hand. That in itself implies we need to analyze more.
But let’s keep this civil, please. I’ve got no interest in joining
the shouting match about climate change. Part of my sharing this
was a hope that we could cut through the opinions on both sides
that seem so entrenched that they won’t even consider the other’s
argument, and see if both sides could find some common ground.
Because like it or not, we’re in this whatever-it-is together.
Being dismissive of others almost never gets you what you want.
So, let’s see if we can give each other the benefit of the doubt.
I’m trying to listen to your comments. Please do that with each
other, as well as with me.
So here’s the reasoning in a nutshell. If you want more detail,
watch for the index at the end of the video:
[At board, with “You can never be 100% certain, so EVERY CHOICE
CARRIES A RISK. Activists warn: Upheaval and destruction. Skeptics
warn: severe economic harm.”]
First off, no one’s perfect. So any choice you make brings with
it a risk if your choice turns out to be a mistake. Given that,
which risk would you rather take: listen to the activists and
take big action now, risking the possible harm to the economy
that the skeptics warn us about, or listen to the skeptics and
don’t take big action now, risking the possible destruction and
upheaval that the activists warn us about. Bottom line is, which
is the more acceptable risk: the risk of taking action, or the
risk of not taking action?
[Foil: Um, geez—when you put it that way. . .{starts to take horns
off}]
Hey, don’t just accept what I say! I’m just some guy. Think it
through for yourself!
[Foil: Okay, okay. {Puts hat back on.} Wait a minute—global warming
isn’t caused by humans in the first place—I’ve seen lots of evidence
for that. So you’re presenting a false choice!]
Are you infallible?
[Foil: No.]
Could you be wrong?
[Foil: Yes.]
So the question “which is the more acceptable risk” still applies
doesn’t it?
[Foil: {acidly} Fine. But it’s still a loaded question.]
Well, take a look at where the question came from, and see if
you agree that it’s a valid one.
[1:00]
If you need to make a decision when things are unclear—like we
do with global warming—it’s useful to look at the different possibilities
for the future.
The first possibility is whether human-caused global warming is
real or not. We’ll put F for the future where it turned out to
be false, and T for true.
The other possibility is what action we end up taking. Let’s make
column A action, and column B no action.
So that gives us a grid that sketches out four basic possibilities
for our future.
What might each of these futures look like?
First is the future where we did take action, and global warming
turned out not to be real after all. Let’s take the most pessimistic
view and say there’s significant harm to the economy, with no
positive benefits.
What about this box? We didn’t take action, and we didn’t need
to. Everybody celebrates: the skeptics because they were right,
and the activists because it wasn’t the end of the world after
all.
How about this box? We took action, and it was a good thing, too,
because here the doomsayers were right. We’ve still got the economic
costs, but everyone’s okay with that, because we saved our cookies.
Now how about this box? The doomsayers were right, but we listened
to the skeptics, and didn’t act. If we took a pessimistic view
up here, let’s do the same thing down here. Well, you’ve heard
this story before: disasters—environmental, political, social,
public health, and economic—on a global scale.
Obviously, this is grossly simplified. The smiley faces should
give that away. But we can say the future will fall roughly into
one of these four boxes.
Most of the shouting match is about trying to predict which row
the future will fall into, which we can’t know for certain until
we get there.
What we can know, because we control it, is which column the future
will not fall into. Because by taking action or not, we are choosing
a column, and that eliminates the risk in the other column.
It’s a bit like buying a lottery ticket—we choose ticket A or
ticket B with its risk, and wait to see what the laws of physics
dish out as our result.
One way or the other, we’re taking a risk: so which risk is more
acceptable, the risk of taking action, or the risk of not taking
action?
[Foil: Hey. . . that sounds good, but the logic is bogus. Wouldn’t
that grid argue for action on any possible threat? No matter how
costly the action, or how ridiculous the threat, like Giant Mutant
Space Hamsters? Because according to that it’s better to go broke
making giant rodent traps than to even risk the possibility of
becoming Hamster Chow, right? So that grid is useless. FLASH!]
Yeah, I totally agree with you.
[Foil: What??]
The grid by itself isn’t a silver bullet. But what it does do
is it allows us to make a decision using uncertain knowledge by
changing the question from “Are humans affecting the climate?”
to the real question “What’s the wisest thing to do, given the
uncertainties and the risks?” Really, it’s just basic risk management.
So to get around your hamster argument, we need to get a sense
of how likely each row is.
[Foil: Why can’t we just wait until the science is finished, and
then we’ll know what to do?]
Well for one thing, that doesn’t avoid risk, because that’s the
same as just choosing column B, which is where we sit right now.
And for another thing, science is never finished—we’re still studying
the law of gravity for Pete’s sake! As a science teacher, I can
tell you that science—that most precise and geeky of all human
endeavors—is surprisingly never certain! Every single scientific
statement carries with it some sort of estimate of how big the
uncertainty is. Which is part of why there will almost always
be some disagreement on any scientific question.
[Foil: But where does that leave us, if anything any scientist
says is accompanied by a sort of “but I could be wrong”?]
The trick is to not look at what individual scientists are saying,
but instead look at what the professional organizations are saying.
The more prestigious they are, the more weight you can give to
their statements, because they’ve got huge reputations to uphold,
and don’t want to ever say something that later makes them look
foolish.
Probably the two most well-respected of these in the world are
NAS [hold up whiteboard reading “the U.S. National Academy of
Sciences”], and AAAS [hold up whiteboard reading “the American
Association for the Advancement of Science”]. These are not advocacy
groups, but both recently issued unprecedented statements calling
for big action now on global warming. This isn’t a bunch of hippies.
These are the nerdiest people on the planet.
[Foil: So trust the eggheads, huh? Basically you’re saying “If
NAS and AAAS said so, who the heck are you to argue?”]
No. Well, sorta. I mean, who else are you going to believe on
a scientific issue? But remember, you still don’t have to believe
them. You’re just using the fact that two such stodgy institutions
staked their reputations on this, to get a sense that this row
must be way more likely than this row, pushing this line up.
Even companies such as these [pull off sheet on board to reveal
the words “USCAP agrees that the world must preserve the possibility
of stabilizing the climate at a level that would avert the most
dangerous impacts of climate change” with list of companies beneath]
are calling for emissions caps—on their own industries!—pushing
the line up even further. Now the conclusion is clear, since we’ve
got solid reasons to believe on our own that this is a much more
threatening risk than this—not only in potential damage, but in
likelihood as well.
[Foil: Okay, I can see that. But if the statements from those
groups are such a slam dunk, then why do we still hear so much
debate?]
Well, there is a handful of dissenting scientists—like there always
is—and a media that knows that controversy sells. But I found
a couple polls that suggest it’s the lack of absolute certainty
that’s holding people back, which is a little odd to me. We buy
car insurance without being certain that we’ll get into an accident,
because we want make sure that if it does happen, we don’t end
up broke.
And during WWII, just the possibility that Hitler might be developing
an atomic bomb was enough of a threat to justify all-out action.
If you were a voter back then and it was public knowledge, would
you have insisted that every scientist interviewed thought such
a bomb was possible before supporting the Manhattan Project? Would
you have held out until you understood the physics? No. So why
are Joe Schmoes like you and me still debating the finer points
of climate science instead of talking about risk management?
[Foil: Well, there’s a gajillion causes out there already screaming
for my attention and money. “Save the Planet” and stuff.]
Look, it’s not the planet that I care about. It’ll do fine on
its own. What I care about is saving our bacon. And I understand
how overwhelming it is when you hear cries about {places placards
on the table, while speaking increasingly quickly}
save the whales, or the rainforests, or the children,
or air pollution, water pollution, light pollution,
toxic waste, nuclear waste, government waste, corporate waste,
Peak Oil, Snake Oil,
flag burning, wire-tapping, gay marrying, immigrating,
ANWR, Anbar,
gun rights, human rights, water rights, right to life, abortion
rights.
Whew! Where do you start?
Well, let me suggest a way to prioritize. All of these [sweep
off desk with a CRASH] will be peanuts, if the worst of this [place
placard reading “global warming”] comes to pass.
[Foil: Oooo, way to go, Mr. Smarty-Pants. {points to floor} You
just managed to tick off pretty much everybody. How come your
pet crusade trumps everyone else’s?]
Because on the outside chance that the worst of global warming
does happen {place placards reading “floods, droughts, hurricanes,
wildfires, dustbowls, famine, epidemics, refugees, wars, economic
collapse” while talking}, we’ll be so busy dealing with the fallout
that most all other human concerns may seem like rearranging deck
chairs on the Titanic. I mean who’s really going to care if some
protester wants to burn the flag on the courthouse lawn when the
whole city’s flooded?
[Foil: But why the hysteria? What’s the big deal about a degree
or two?]
Yeah. Turns out it’s not the warming that gets ya. It’s the way
that such a quick change throws a monkey wrench in the whole system.
That’s why global “warming” is a misleading name, and global “climate
change” is only a little better. Really, what we’re talking about
is “global climate destabilization.” And it gets worse. Because
just in the last 5 years we’ve learned that this may happen very
abruptly, like within the span of a decade. It may turn out to
be like pushing a light switch: small pushes in the past have
created only small results, until you hit an unexpected tipping
point.
[Foil: Man, we’re totally hosed. We’re going back to the Dark
Ages, aren’t we?]
Disturbing, isn’t it? Actually, there’s a lot of reason to believe
we can fix this—maybe even without reducing our standard of living.
If we’re quick about it.
[Foil: But what difference can I make? I’m just one guy. . .
with a stupid hat.]
What you do is—spread the word! Because the only way we really
get into column A. . . is by policy changes. And those only happen
when enough people demand it. So you forward this video to others.
If they forward it to ten others, and so on, in just 4 steps,
that’s over ten thousand people that may have their opinions influenced.
That’s power. Use it.
This is likely to be the greatest threat that humanity has ever
faced. Think that’s overblown? Maybe. But can you be so certain
that you’re willing to bet everything? Because we only get to
run this experiment once.
Hopefully this idea of risk management will end the debate. How
the world ends up? Well, that depends in part on you. And what
you do next.
We have greatness within us—innovative, giving, determined. It’s
time for the best in us to come out.
[desk] Forgive me for the poor production values and the fact that
I’m reading like a banshee, but I’m responding to over 2000 comments,
so I’ve got a lot to cover. Believe it or not, I’d anticipated each
of those critiques—I just couldn’t fit all that into a nine-and-a-half
minute video. I know that sounds kinda condescending and douchey,
but it’s just that I’m a nerd about this stuff, and have spent A
LOT of time thinking and reading about it, so I’ve done this debate
already in my head literally hundreds of times. Sometimes I even
win. [At WB] One of the main critiques was that I’d oversimplified.
Well, the problem we face is this: things are either simple, or
they’re complex. No, wait—that’s oversimplified. [cut] Things fall
somewhere in the spectrum between being simple and complex. Simpler
things are quicker to express and understand, while complex things
take longer. As a rule, complex arguments can be stronger than simple
arguments. This is why everyone hates legal documents. And this
is why everyone agrees we still need them. So here’s our problem,
you and I: here’s surfing the web, and here’s the issue of global
climate change. And here’s how we get from one to the other: I’ve
got just a few minutes to catch your attention, so I “Hey, look
at this!” And then you say “That’s oversimplified. You missed a
spot. I’m outta here.” And then I say “Wait! I know. Fill it in
yourself.” And then you say “Well that’s just Pascal’s wager anyway.
I’m outta here.” And then I say “Wait! It only looks like Pascal’s
wager cuz they’re both decision grids. This one isn’t sunk by the
infinities his had.” And then you say “Well, still, your argument
could be used for any threat, like a flying spaghetti monster. That’s
just ridiculous. I’m outta here.” And then I say “Wait! You’re right!
What we really need to do is assign some probabilities here.” And
then you say “Fine. Top row 99%, bottom row 1%.” And then I say
“Wait! I disagree!” And then you say “Well then where are we supposed
to get those probabilities? I’m not buying yours because you’re
a dork.” And then I say “Hey, let’s be civil.” And then we have
a long discussion about criteria for estimating probabilities, and
after massive, bruising negotiations, we agree on some ranges. And
then I say “Ok, now let’s assign some numerical measure of desirability
for each box” And then you say “Crap!” And then we have another
frank and wide-ranging discussion to agree on some rough numbers.
And then I say “Okay, let’s take the expected value of this puppy
so we can agree on the best bet.” And then you say “But expected
value is a flawed mechanism. What about the St. Petersburg paradox?”
And then I say “Yeah, but it’s good enough for casinos and insurances
companies, so let’s use it here.” And then by that time you haven’t
even said the last half of those things, because way back here you’ve
gotten distracted by a link in the side bar with a picture of mentos,
or something blowing up, or someone in skimpy clothes, or all three,
and--I admit--it, I’d do the same thing if I weren’t already a total
nerd about this stuff. [desk] So what I’m asking you to do is: spend
a few more minutes of your life exploring the complexities, watching
this and following videos. Isn’t an issue this important worth a
few minutes? Trying to strike a balance, I’m going to give just
a one-or-two line response for each of the main critiques, so we
can get one step closer to the right. So, I am not being dismissive
of any arguments—I am just being necessarily brief. If that brevity
doesn’t do it for you, leave a comment with a request for more detail
on the YouTube page, and I’ll elaborate more in a later video. Here
we go. [WB-small grid] Objection: That’s just Pascal’s Wager, which
has more holes than swiss cheese. My response: It looks like Pascal’s
Wager because they are both basic decision grids. What sunk his
was the infinite payoffs, and assumptions without evidence. This
one has finite payoffs, and assumptions based on evidence. Objection:
That grid could be used to conclude that action is required on every
single threat, no matter how outlandish. Thus, if we buy the grid,
then we go bankrupt preventing every possible contingency. My response:
You’re totally right! That’s why, to be useful, we need to get down
and dirty and assign some probabilities here, which I guess I didn’t
imply strongly enough last time, as well as some numerical measure
of desirability for each grid. Then you can do a trick called the
“expected value” from probability theory, and actually calculate
which column is most desirable. This is how casinos and insurance
companies can pay out huge amounts of money based on unpredictable
events, and still be confidant they’ll make a profit. So it all
comes down to assigning those numbers. We’ll address that in a minute.
[desk] Objection: There are so many problems, but only finite resources.
Why start with climate change? My response: I had a professor of
chemistry, oceanography, and atmospheric sciences—all one guy--who
put it this way: “Paper or plastic? Doesn’t matter! Save the whales?
Doesn’t matter? Toxic waste? Save social security? Pro-life or pro-choice?
Doesn’t matter! If the worst of the potential consequences of global
climate change come to pass, it will so dominate us as a species
that every other conceivable issue will seem insignificant. It would
be like re-arranging deck chairs on the Titanic.” Which brings us
to our next objection: [WB, small grid] Objection: The consequences
in the lower right hand corner are overplayed. My response: They
aren’t the most likely scenarios, but they are discussed seriously
and increasingly in the scientific community, including in the Pentagon
in a 2004 report on climate change as a threat to national security.
[WB, diagram] To give you just a flavor of why, think about the
feedback when you put a microphone in front of its own speaker.
The smallest tap rapidly turns into a runaway screech because the
output of the system feeds back into the input. There are a host
of such systems in the climate. Here’s just a couple: [WB, diagrams]
Carbon dioxide traps some of the sun’s energy. If something heats
up the ocean just a little, it releases CO2 that was dissolved,
into the atmosphere. The released CO2 traps more heat, heating the
ocean, releasing more CO2, heating the ocean even more, and so on.
Or, heating the ocean melts some of the methane hydrates frozen
at the bottom, releasing methane into the atmosphere, trapping more
heat, heating the ocean further, releasing more methane, and so
on. There are a number of others. Pile those all up, and presto--drastic
and abrupt climate change is very feasible. [desk] Objection: What
about China and the rest of the third world? What good will it do
if the U.S. takes action and they don’t? My response: Lots! With
only 5% of the world’s population, we in the US produce 25% of its
CO2 emissions. We’re a big chunk of the problem. Worried they’ll
leapfrog us? We sell the clean technology to them! Plus, this isn’t
necessarily all-or-nothing. There are probably intermediate conditions,
and any action would probably improve the outcome. Objection: Who’s
to say a little warming is a bad thing? My response: The climate
is tremendously complex. It’s more accurate to think of “global
warming” as “global climate change,” and even more descriptive to
think of it as “global climate destabilization.” Who’s to say a
light tap on the chest is a bad thing? It’s not, unless you’re standing
on the top of a post. [WB, list of objections by small grid] Objection:
It’s not that simple. What about the intermediates between no action
and all-out action. What if climate change is happening, but we’re
not the ones doing it? What if climate change is happening, and
we’re the ones doing it, but our actions don’t stop it? Or they
make it worse? What if the depression in this box were way worse
than just a loss of jobs? Didn’t the Great Depression lead to Hitler?
Couldn’t another one lead to nuclear war, or the dissolution of
America? And if we accept that this hypothetical depression would
be caused by the action in this column, shouldn’t it appear in this
box, too? My response: I tried to encourage you to play with the
complexities yourself, but let’s go ahead and play together. So
really, our grid should look like this: [WB, big grid] Holy sh*t,
it exploded! We’ve got five columns representing five different
degrees of action, from all-out to status quo. Down the side, GCC
stands for global climate change, and A stands for anthropogenic,
the climate change “lingo” for human-caused. So we’ve got scenarios
that range from: GCC false, but our actions negatively affect the
climate GCC false, climate not affected GCC true, but not A, and
actions cannot affect climate GCC true, but not A, can be negatively
affected GCC true, but not A, can be positively affected GCC true,
A, can not affected GCC true, A, actions negatively affect climate
GCC true, A, and our actions positively affect climate Into each
of these 40 boxes we put our different economic, environmental,
social, political, and public health scenarios, including all these
questions about a potential depression. And then we assign to each
box a number to represent its payoff or cost. Then we assign a probability
for each row. Finally, we can use those numbers to calculate the
expected value to give an indication of which column is our best
bet. Ready? Juuuuust kiddin’. . . There’s no WAY I’m qualified to
do all that. And neither are you, probably. So what do we do with
it? Here’s a suggestion: we hire a bunch of really smart people
to do it for us and report back ASAP. [WB, b/w list of objections
and small grid] We’ll get back to that in a minute, because I don’t
want you to think that’s a total cop out. Here’s my best-guess to
these concerns: First, I think the feasibility of our action causing
a global depression is very questionable for the following reasons:
Was it runaway government spending that caused the Great Depression
of the 1930s? I’m no student of history, but wasn’t there something
about a stock market running away with optimism? B-- Wasn’t there
also something about huge government spending that actually helped
bring us out of it? C-- Here we can be very deliberate and controlled
about our actions, minimizing any destabilization. Second, if we
did get a global depression, there could conceivably be serious
problems besides economic ones. But if planned, controlled spending
sparked a worldwide depression here, then panicked, last-minute
spending in a crisis here would almost certainly do the same here.
So down here we’d have all those problems, compounded by tremendous
natural disasters in a destabilized climate. Third: shouldn’t this
depression show up here, too? Like I said, I don’t think there’s
much evidence that it’s feasible. To further decrease its feasibility
here, I’d argue that much of the dynamics of an economy is based
on human psychology. If you question that, just listen to any daily
report about how the market “reacted” that day. And since in this
box, the spending and regulation would be perceived as justified
and good, it decreases the likelihood that it would have a hugely
negative impact. In fact, a strong argument can be made that innovation
leads to a stronger economy. [WB, big grid] So back to the idea
of hiring all those smart people to do this grid for us. . . . How
do we know that’s worth the time and money? The way I do it is look
at non-advocacy professional associations that don’t have huge vested
interests. Like the National Academy of Sciences, or AAAS, which
publishes Science magazine, the gold standard of scientific journals.
Both organizations recently released official, strongly worded statements
about the necessity to address climate change. The one from AAAS
started: [WB, by quote] “The scientific evidence is clear: global
climate change caused by human activities is occurring now, and
it is a growing threat to society.” And it ends: [WB, by quote]
“The growing torrent of information presents a clear message: we
are already experiencing global climate change. It is time to muster
the political will for concerted action. . . . We owe this to future
generations.” Wait, was that the Sierra Club? No! It was perhaps
the most respected scientific organization in the world! Man, if
that doesn’t sound like a conclusion, I don’t know what would. [WB,
big grid] So back to our probabilities: if you look at what the
scientific community is saying, not just individual scientists,
it makes a very strong case that these rows are much more likely
than these rows. So I’d say yeah, we need to act. In fact, we need
to get all of our top people on this right away. I’m talking a project
on the scale of the Manhattan Project and the Apollo Project put
together. We’ve got a good start on the technology already. We can
do this. And here’s a bonus, the sooner we act the smarter we can
be about it, and so there’s a good chance we can make drastic reductions
in CO2 emissions without drastic reductions in standard of living.
But the longer we wait, the less likely that becomes. I’m reminded
of what the guy in charge of trash disposal for New York City said
about the landfill crisis a while back. He was arguing for proactive
action, and he said: “The problem will be solved. We can either
do it now, or we can do it 20 years down the road, in a panic, at
20 times the cost, and 20 times the environmental damage. But it
will get solved.” I hope I tied up all the loose ends. If you want
more details on a specific topic, please tell me, and I’ll try to
respond. I’d be happy to talk more about: - expected value, or -
how do you decide what to believe when different experts are telling
you contrary things?, or - the basic mechanisms of global climate
change, or - feedback loops, tipping points, and abrupt climate
change, or - why you and I don’t even need to try and figure out
whether all those counter arguments are true or not: the ones about
solar activity, warming on other planets, natural cycles, cosmic
rays, and proxy data. Let me know what you want to hear. Politely.
[Black screen briefly] [desk, slower] Remember when everybody tore
into the FBI because it had all the information it needed to stop
the September 11th attacks at the time, but it didn’t connect the
dots that were so easy for us to connect in hindsight? I keep thinking
about that. Why don’t we see if the dots connect now? Instead of
doing it in hindsight. Don’t we deserve that much? We can do this.
Pass it on.
Hi. Thanks for sticking with me this far. I tried to make this
video short, but just couldn’t do it. So I thought if I periodically
blew up some stuff for you, it might help keep your attention.[explosion]
The author Douglas Adams noted that “the most dangerous assumptions
are the ones you don’t know you have.” I realize now that in my
first video “The Most Terrifying Video You’ll Ever See,” I made
some assumptions that it turns out weren’t shared by everybody.
My bad. My goal was to get people thinking in terms of risk management,
instead of just debating scientific statements that they may or
may not be in a good position to evaluate.
It seems we do have to talk about rows after all. As one commentor
put it: “You seem to have retreated from your claim that you have
an argument that dodges the argument. Now you just have an argument.”
So here’s my goal for the next couple minutes: I hope to convince
you that it’s in your interest to do what you can to increase
public demand for policy action on human-caused climate change.
If I fail to convince you of that, I have a fall-back plan. A
sort of consolation prize.
[Break]
The problem of course is, if you’re not a climatologist yourself,
how to do go about sifting through all those contradictory statements
by different experts? Robert Lindzen vs. the IPCC, the Oregon
Petition vs. The World Scientists’ Warning to Humanity, the Leipzig
Declaration. How do you decide what to believe and what not to?
One of the dangers we should all be aware of here is that it’s
just human nature for us to hear the evidence that supports what
we already believe, and downplay the evidence that contradicts
it.
So, I hope I can help you sort that out. As a science teacher,
I’m sort of halfway in between being a Joe Schmoe and being a
scientist. I have some understanding of the workings of both worlds,
and maybe can help translate some stuff for you. Some people have
asked about my specific qualifications, and maybe I’ll do another
short video on that if enough people express interest.
[What, the shirt’s not enough??]
The short answer is, it shouldn’t matter what my qualificaitons
are, cuz you shouldn’t take what I have to say at face value.
That’s what Google is for
.[Explosion.]
As we--the Joe Schmoes of the world--try to decide what to do
with the different things that scientists are telling us, one
of the problems we run into is this: we think of science as being
the most precise and certain of human endeavors, so we expect
it to tell us the “correct” answer.
But the surprising irony is: science is never certain. Uncertainty
is inherent in all science. I’d be happy to explore this in greater
detail in yet another video if you’d like, but the upshot is this:
science is based on measurements, and every single time a measurement
taken, the scientist aknowledges that neither they nor their instrument
can be perfect, and therefore they make an estimate of how big
the error--or uncertainty--might be.
And then they put the idea out there and invite criticism, so
that weak points can be identified and strengthened, and the uncertainty
reduced. That’s why it’s so important to ask if the statement
you’re hearing about climate change has been “peer-reviewed”--that’s
the official process that science uses to try to get closer and
closer to “the truth” about the physical world. But it never claims
to actually gets there.
So where does that leave us, if every statement from science
is accompanied by an implicit “but I could be wrong”? How do we
decide what to go on?
[Break]
Here are two rules of thumb: The first is, if you have the inclination,
you can look at what scientists are saying to each other. I regularly
read some scientific and lay scientific literature, and I’ll tell
you, for a number of years now, the tenor about climate change
has been not at all controversial. Generally when it’s mentioned,
it assumes the reader is on board with the idea that humans are
causing the climate to change. The hot debate is on what exactly
that will look like, and how fast it will happen. That should
tell you something.
The second rule of thumb--and the easier of the two--is to see
what statements float to the top of that whole bruising process
of peer-review and scientific debate. You do that by looking at
what the professional associations are saying, because generally,
only the most robust, well-tested, agreed-upon ideas will be adopted
by those organizations of scientists. Their pronouncements are
about as close as we can get to a gold standard of “What science
knows.” Unfortunately, that process takes time to play itself
out.
Fortunately, on the subject of human-caused climate change, that’s
largely already happened. In the last couple years, two of the
world’s most respected scientific bodies--the U.S. National Academy
of Sciences (NAS) and the American Association for the Advancement
of Science (AAAS)--have both published statements essentially
saying: the climate is changing, humans are the ones primarily
doing it, it’s gonna be bad, and we’d better get started doing
something ASAP.
I shared this in a previous video, but it’s worth repeating here.
The AAAS statement said: “The scientific evidence is clear: global
climate change caused by human activities is occurring now, and
it is a growing threat to society.”
It also pointed out that:“The longer we wait to tackle climate
change, the harder and more expensive the task will be.”
You catch that? More expensive. This isn’t a bunch of hippies.
This is as close as you get to the Science Establishment (capital
letters). These are the nerdiest people on the planet.
The NAS statement said:“The scientific understanding of climate
change is nowsufficiently clear to justify nations taking prompt
action.”and calls on world leaders to “Acknowledge that the threat
of climate change is clearand increasing.”
Why are we still talking about this? In matters of science, you
don’t get any more authoritative that the National Academy or
AAAS. I gotta tell you folks, if that’s not good enough for you,
then nothing from science ever will be.
Sometimes you hear “there is no consensus amongst scientists
about global warming.” New flash! There is no consensus amongst
scientists on anything. There will always be scientists who disagree.
You know why—because science is uncertain!
Pick the most well-known, well-established scientific law you
can think of. The Law of Gravity, right? Guess what? There’s no
consensus on it! We’ve got a satellite up there right now, Gravity
Probe B, testing to see if we can disprove our current understanding
of gravity. If you’re waiting for there to be no dissent at all,
then you’ll wait forever, no matter what the scientific issue.
Science is never certain. So why listen to it all? Because it’s
the best we’ve got. And the best science we have, articulated
by the most well-respected organizations in the world, is that:
the globe is warming, we’re the ones driving it, it’s gonna be
bad, and we’d better do something about it quick.
If you’d like to argue any of those points, feel free. But you
better come loaded for bear, because you’ll be going up against
two of the premier scientific bodies in the world. So you’d better
bring with you some extraordinary evidence, and not just a couple
ideas that sound good, like “Mars is warming too, you know,” or
that CO2 lags temperature in the ice core record. Both true. Both
irrelevant. Do you think these guys don’t know what they’re doing?
You can think what you’d like about what the future might hold,
but you can’t deny that we are essentially running an experiment
right now on what sorts of effects we can or cannot have on the
global climate. The kicker is, whatever the outcomes of the experiment,
you’re in the test tube.
And that’s why it’s in your interest to do whatever you can to
increase public demand for policies that take significant and
immediate action on climate change. Make no mistake: anything
less, and you would be explicitly denying the best that science
has to offer.
[Beat]
Okay, I see you’re still not convinced. You’re a tough nut to
crack. How about this:Imagine you’re back in WWII, and the new
possibility of an atomic weapon was public knowledge, instead
of top secret. Would you have insisted on understanding the finer
points of atomic physics before agreeing to the funding for the
Manhattan Project? Would you have been against it until every
scientist interviewed by the media said that it was possible?
No. You would have agreed that just the potential of Germany possessing
a super weapon was a great enough threat to justify putting our
best and brightest on the job. To have them work with the greatest
urgency towards an end that no one was certain they could achieve.
Well, if the possible threat of an atomic weapon in the hands
of Germany—just the possibility—was enough to justify the Manhattan
project, don’t the statements from AAAS and NAS—our most authoritative
scientific bodies--give us enough already to justify a similar
project for climate change? To get our best and brightest and
have them do this grid, with numbers and all, right away.
Let’s not kid ourselves anymore. You can ask about solar activity,
or natural cycles, or proxy data, but the climate is way too complex
for you or me to do armchair evaluation of this stuff in the face
of so much peer-reviewed science Let’s get the big boys (and girls)
on it. Don’t we deserve that? I am not talking about forming another
commission to “study the problem further.” We’ve been doing that
for 20 years, and the statements I shared earlier make it clear
that that time is past.
I’m talking a project on the scale of the Manhattan project and
the Apollo project put together. We could even call it the Manpollo
Project. One with the greatest national urgency and resources,
drafting the best scientists, political economists, historians,
and analysts on the planet to bring their greatest effort to bear,
to work round the clock on what our best scientists say may be
the greatest challenge we’ve ever faced.
In fact, there’s a silver bullet! Both sides of the debate will
agree that we should have such a Manpollo, project, and here’s
why: because each side thinks the project will get us closer to
the truth, and dispel the untruths that the other side has spun.
So we all want this, because everyone thinks they’re right, and
would love further ammunition to prove the other side wrong. Wouldn’t
that be worth the cost?
Because a Manhattan Project is not going to cause a global depression.
An Apollo Project is not going to going to bankrupt the US, or
lead to government control of your life. So what’s to lose? If
we have a Manpollo project and it finds that human-caused climate
change turns out to be bunk, then hey--okay, we diverted some
government jobs from one sector to another.Isn’t reducing the
uncertainty about this at least worth that cost? Let’s get to
it!
[Break]
If you find an error in my assumptions or reasoning, please tell
me where. And if you can’t, then for Pete’s sake, don’t just sit
there! Spread the word! Talk to your friends! Forward this to
others. Get clickin’! Let’s make this the chain letter that maybe
ended up saving our collective ass!
[Beat]Sorry. I get kind of worked up about this. Anyway, that’s
my understanding of things. But I could be wrong.[Reverse explosion.]