Nobel Prize winning economist Paul Krugman recently published two op-eds on climate change in the NYT:
Cassandras of Climate
By PAUL KRUGMAN
Every once in a while I feel despair over the fate of the planet. If you’ve been following climate science, you know what I mean: the sense that we’re hurtling toward catastrophe but nobody wants to hear about it or do anything to avert it.
And here’s the thing: I’m not engaging in hyperbole. These days, dire warnings aren’t the delusional raving of cranks. They’re what come out of the most widely respected climate models, devised by the leading researchers. The prognosis for the planet has gotten much, much worse in just the last few years.
What’s driving this new pessimism? Partly it’s the fact that some predicted changes, like a decline in Arctic Sea ice, are happening much faster than expected. Partly it’s growing evidence that feedback loops amplifying the effects of man-made greenhouse gas emissions are stronger than previously realized. For example, it has long been understood that global warming will cause the tundra to thaw, releasing carbon dioxide, which will cause even more warming, but new research shows far more carbon dioxide locked in the permafrost than previously thought, which means a much bigger feedback effect.
The result of all this is that climate scientists have, en masse, become Cassandras — gifted with the ability to prophesy future disasters, but cursed with the inability to get anyone to believe them.
And we’re not just talking about disasters in the distant future, either. The really big rise in global temperature probably won’t take place until the second half of this century, but there will be plenty of damage long before then.
For example, one 2007 paper in the journal Science is titled “Model Projections of an Imminent Transition to a More Arid Climate in Southwestern North America” — yes, “imminent” — and reports “a broad consensus among climate models” that a permanent drought, bringing Dust Bowl-type conditions, “will become the new climatology of the American Southwest within a time frame of years to decades.”
So if you live in, say, Los Angeles, and liked those pictures of red skies and choking dust in Sydney, Australia, last week, no need to travel. They’ll be coming your way in the not-too-distant future.
Now, at this point I have to make the obligatory disclaimer that no individual weather event can be attributed to global warming. The point, however, is that climate change will make events like that Australian dust storm much more common.
In a rational world, then, the looming climate disaster would be our dominant political and policy concern. But it manifestly isn’t. Why not?
Part of the answer is that it’s hard to keep peoples’ attention focused. Weather fluctuates — New Yorkers may recall the heat wave that pushed the thermometer above 90 in April — and even at a global level, this is enough to cause substantial year-to-year wobbles in average temperature. As a result, any year with record heat is normally followed by a number of cooler years: According to Britain’s Met Office, 1998 was the hottest year so far, although NASA — which arguably has better data — says it was 2005. And it’s all too easy to reach the false conclusion that the danger is past.
But the larger reason we’re ignoring climate change is that Al Gore was right: This truth is just too inconvenient. Responding to climate change with the vigor that the threat deserves would not, contrary to legend, be devastating for the economy as a whole. But it would shuffle the economic deck, hurting some powerful vested interests even as it created new economic opportunities. And the industries of the past have armies of lobbyists in place right now; the industries of the future don’t
Nor is it just a matter of vested interests. It’s also a matter of vested ideas. For three decades the dominant political ideology in America has extolled private enterprise and denigrated government, but climate change is a problem that can only be addressed through government action. And rather than concede the limits of their philosophy, many on the right have chosen to deny that the problem exists.
So here we are, with the greatest challenge facing mankind on the back burner, at best, as a policy issue. I’m not, by the way, saying that the Obama administration was wrong to push health care first. It was necessary to show voters a tangible achievement before next November. But climate change legislation had better be next.
And as I pointed out in my last column, we can afford to do this. Even as climate modelers have been reaching consensus on the view that the threat is worse than we realized, economic modelers have been reaching consensus on the view that the costs of emission control are lower than many feared
So the time for action is now. O.K., strictly speaking it’s long past. But better late than never.
It’s Easy Being Green
By PAUL KRUGMAN
So, have you enjoyed the debate over health care reform? Have you been impressed by the civility of the discussion and the intellectual honesty of reform opponents?
The House has already passed a fairly strong cap-and-trade climate bill, the Waxman-Markey act, which if it becomes law would eventually lead to sharp reductions in greenhouse gas emissions. But on climate change, as on health care, the sticking point will be the Senate. And the usual suspects are doing their best to prevent action.
Some of them still claim that there’s no such thing as global warming, or at least that the evidence isn’t yet conclusive. But that argument is wearing thin — as thin as the Arctic pack ice, which has now diminished to the point that shipping companies are opening up new routes through the formerly impassable seas north of Siberia.
Even corporations are losing patience with the deniers: earlier this week Pacific Gas and Electric canceled its membership in the U.S. Chamber of Commerce in protest over the chamber’s “disingenuous attempts to diminish or distort the reality” of climate change.
So the main argument against climate action probably won’t be the claim that global warming is a myth. It will, instead, be the argument that doing anything to limit global warming would destroy the economy. As the blog Climate Progress puts it, opponents of climate change legislation “keep raising their estimated cost of the clean energy and global warming pollution reduction programs like some out of control auctioneer.”
It’s important, then, to understand that claims of immense economic damage from climate legislation are as bogus, in their own way, as climate-change denial. Saving the planet won’t come free (although the early stages of conservation actually might). But it won’t cost all that much either.
How do we know this? First, the evidence suggests that we’re wasting a lot of energy right now. That is, we’re burning large amounts of coal, oil and gas in ways that don’t actually enhance our standard of living — a phenomenon known in the research literature as the “energy-efficiency gap.” The existence of this gap suggests that policies promoting energy conservation could, up to a point, actually make consumers richer.
Second, the best available economic analyses suggest that even deep cuts in greenhouse gas emissions would impose only modest costs on the average family. Earlier this month, the Congressional Budget Office released an analysis of the effects of Waxman-Markey, concluding that in 2020 the bill would cost the average family only $160 a year, or 0.2 percent of income. That’s roughly the cost of a postage stamp a day.
By 2050, when the emissions limit would be much tighter, the burden would rise to 1.2 percent of income. But the budget office also predicts that real G.D.P. will be about two-and-a-half times larger in 2050 than it is today, so that G.D.P. per person will rise by about 80 percent. The cost of climate protection would barely make a dent in that growth. And all of this, of course, ignores the benefits of limiting global warming.
So where do the apocalyptic warnings about the cost of climate-change policy come from?
Are the opponents of cap-and-trade relying on different studies that reach fundamentally different conclusions? No, not really. It’s true that last spring the Heritage Foundation put out a report claiming that Waxman-Markey would lead to huge job losses, but the study seems to have been so obviously absurd that I’ve hardly seen anyone cite it.
Instead, the campaign against saving the planet rests mainly on lies.
Thus, last week Glenn Beck — who seems to be challenging Rush Limbaugh for the role of de facto leader of the G.O.P. — informed his audience of a “buried” Obama administration study showing that Waxman-Markey would actually cost the average family $1,787 per year. Needless to say, no such study exists.
But we shouldn’t be too hard on Mr. Beck. Similar — and similarly false — claims about the cost of Waxman-Markey have been circulated by many supposed experts.
A year ago I would have been shocked by this behavior. But as we’ve already seen in the health care debate, the polarization of our political discourse has forced self-proclaimed “centrists” to choose sides — and many of them have apparently decided that partisan opposition to President Obama trumps any concerns about intellectual honesty.
So here’s the bottom line: The claim that climate legislation will kill the economy deserves the same disdain as the claim that global warming is a hoax. The truth about the economics of climate change is that it’s relatively easy being green.
Change measurements (meters per yr) are median filtered (10-km radius), spatially averaged (5-km radius) and gridded to 3 km over the period 2003–2007