https://www.nytimes.com/interactive/2020/12/16/magazine/russia-climate-migration-crisis.html
notable quote and food for thought:
Marshall Burke projects that over the next 80 years, per capita G.D.P. in the United States will drop by 36 percent compared to what it would be in a nonwarming world, even as per capita G.D.P. in Russia will quadruple. A recent study led by researchers at Columbia University found that a disruption in U.S. agriculture would quickly propagate throughout the world. After just four years of a Dust Bowl-like event — a time when some crop yields dropped by 60 percent — global wheat reserves would be cut by nearly a third, and U.S. reserves would be almost entirely gone. And as the livability and capacity of American land wanes, U.S. influence in the world may fade along with it.
This is the sort of odd mixing/misuse of percentages that statisticians *hate*.
Russia's per capital GDP is about $11,000. The US is $62,000. So just off the bat, you're comparing a developing country with a developed one, and growth rates for GDP are generally much lower for developed economies.
Next, we've got that 36 percent number hanging out in space. Annual GDP growth in the US in recent times (say, past 20-30 years) has averaged in the ballpark of 3%, which means in 80 years the US economy (absent climate change issues) will be roughly 10 times the size it is now (per capita GDP around $650k).
Knock 36 percent off and you're at $416k, so a bit less than 7 times as big as today.
So here's your new headline: With climate change, US GDP will only septuple, while Russia's will quadruple.
I'll also note that quadrupling Russia's GDP over 80 years implies a growth rate of 1.75 percent, which is AWFUL when starting from their low base.
Now, the authors might not be communicating well, but they're *journalists*. It's their *job* to make this understandable and either they don't get it themselves, or they can't accurately communicate it.
Note that none of this means I disagree about climate change being a big, big problem.
-W