Global warming - Wikipedia, the free ... - http://en.wikipedia.org/wik...
Global warming is the increase in the average temperature of Earth 's near-surface air and oceans since the mid-20th century and its projected continuation.

Global Warming | Union of Concerned ... - http://ucsusa.org/global_wa...
Global warming is one of the most serious challenges facing us today. To protect the health and economic well-being of current and future generations, we must reduce our emissions ...

Global warming controversy - Wikipedia, the ... - http://en.wikipedia.org/wik...
The global warming controversy is a dispute regarding the nature, causes, and consequences of global warming. The disputed issues include the causes of increased global average air ...

Climate Change | U.S. EPA - http://www.epa.gov/climatec...
The EPA Climate Change site provides comprehensive information on the issue of climate change and global warming in a way that is accessible and meaningful to all parts of society ...

Global Warming - http://www.globalwarming.org/
Attempts to dispell the anthropogenic global warming hypothesis by showing the flawed economic, scientific, and risk analysis in relation to the current political situation.