[Updated September 16, 2015 ] Man-made global warming worsens the extreme drought in the American West because of its excessiv...

Global warming is the rise in the average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the ...
[Updated September 16, 2015 ] Man-made global warming worsens the extreme drought in the American West because of its excessiv...