Chart of the Day: Turning the Entire Planet Into a Tropical Zone Might Be Bad for Economic Output

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People in hot climates don’t work as hard as people in more temperate climates. It’s hot! You get tired more quickly. You need to take more breaks. You don’t get as much done.

This is hardly a new insight. But it turns out you can measure how much less people work when the temperature goes up. And the answer is: about 2% less for every extra degree Celsius (see chart below). A recent natural experiment confirmed this, when the Japanese government asked businesses to use less air conditioning after the Fukushima earthquake and tsunami. Productivity decreased at just about the predicted rate.

But earthquakes and equatorial latitudes aren’t the only things that raise temperatures. Global warming does it too. So what does that mean for worker productivity in the future? Solomon Hsiang, a sustainable development post-doc at Princeton, explains:

In my 2010 PNAS paper, I found that labor-intensive sectors of national economies decreased output by roughly 2.4% per degree C and argued that this looked suspiously like it came from reductions in worker output.

[From a later post] Reductions in worker output have never been included in economic models of future warming [] despite the fact that experiments fifty years ago showed that temperature has a strong impact on worker output []. In my dissertation I did some back-of-the-envelope estimates using the above numbers and found that productivity impacts alone might reduce per capita output by ~9% in 2080-2099 (in the absence of strong adaptation). This cost exceeds the combined cost of all other projected economic losses combined.

Of course, maybe robots will be doing all our work for us by then. But maybe not. It’s yet another reason — in addition to famines, drought, drowned cities, and the death of millions — to think that turning the entire world into a tropical zone might not be such a great idea.

Via Andrew Gelman at The Monkey Cage.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

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Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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