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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .Despite the Great Recession, more people are better off around the world today than ever before.
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3 .At the same time, atmospheric carbon dioxide levels have never been higher in human history, thanks to fossil fuel burning, forest clearing and other activities that make people rich.
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4 .So what can be expected if the world increases the wellbeing of an ever increasing proportion of people?
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5 .In short: even more CO2.
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6 .That's the finding of a study in the journal Nature Climate Change.
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7 .Economists and policy analysts held out hope that global wealth could continue to rise without also raising CO2 emissions.
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8 .But a look back at life expectancy at birth compared with per capita pollution around the world from 1970 to 2009 suggests otherwise.
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9 .Economic development in the poorest countries starts off by reducing CO2 pollution in the 1970s and 1980s,
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10 .perhaps because fossil fuel burning replaces even more polluting fires in individual homes.
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11 .But in more recent years that benefit has leveled off.
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12 .And developed countries like the U.S.or China seem to increase emissions whenever the economy grows.
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13 .A switch to energy sources that produce less CO2 seems key to breaking that link.
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14 .In the long run, after all, checking climate change is vital to human wellbeing too.
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15 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.
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