Simple, inexpensive measures to cut emissions of two common pollutants will slow global warming, save millions of lives and boost crop production around the world, a large international team of scientists reported Thursday.
The climate change debate has centered on carbon dioxide, a gas that wafts in the atmosphere for decades, trapping heat. But in recent years, scientists have pointed to two other, shorter-term pollutants — methane and soot, also known as black carbon — that also drive climate change.
Slashing emissions of these twin threats would be a “win-win-win” for climate, human health and agriculture, said NASA climate scientist Drew Shindell, who led the study appearing in the journal Science. “Even if you don’t believe climate change is a problem, these things are worth doing.”
Reducing methane and soot would slow global warming dramatically — by almost a degree Fahrenheit — by the middle of the century, according to computer simulations run by the 24-member international team.
At the same time, the simulations show that such actions would save 700,000 to 4.7 million lives annually, as better air quality would prevent lung and cardiovascular diseases.
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