Global Warming Article Synopsis

What drives climate change?

Courtesy MSNBC.com


The atmosphere
A third of the sun's energy is reflected back into space after hitting Earth's upper atmosphere, but two thirds gets through, driving Earth's weather engine.

Solar input
A delicate balance of gases gives Earth its livable temperature. Known as “greenhouse” gases because they trap heat inside the atmosphere, they send a portion of that heat back to Earth's surface. The gases include water vapor, carbon dioxide, methane and nitrous oxide.


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