Cut back on soot, methane to slow warming: study

There are simple, inexpensive ways to cut back on two major pollutants -- soot and methane -- and taking action now could slow climate change for years to come, international scientists said Thursday.

Geoengineering could save Earth -- or destroy it

(AP) -- Brighten clouds with sea water? Spray aerosols high in the stratosphere? Paint roofs white and plant light-colored crops? How about positioning "sun shades" over the Earth?

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