Pollution May Be the Cause of Earth’s Expanding Tropical Belt

May 17, 2012

Manmade pollutants, such as black carbon and tropospheric ozone, are most likely what’s causing the tropical belt expansion northward, a new study says.
 
In the Southern Hemisphere, depletion of stratospheric ozone has previously been shown to be the cause of tropical expansion. But, in the Northern Hemisphere, the main cause appears to be black carbon and tropospheric ozone pollution, the study says.

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