Mongabay: Soot is the second largest man-made contributor to global warming, according to a comprehensive new study published in the Journal of Geophysical Research: Atmospheres.
The research effectively doubles the estimate of soot's direct warming influence on climate. Soot is produced from the burning of diesel fuel, coal, charcoal, and wood.
"Accounting for all of the ways black carbon can affect climate, it is believed to have a warming effect of about 1.1 Watts per square meter, approximately two-thirds...