Five science questions that ought to be asked at the debate
Key messages about climate change: an introduction to a series
Evidence shows warming of the planet
The evidence is compelling on human activity as the principle cause of global warming
Extreme events "presage worse to come" in a warming climate
Multiple extreme climate events can combine to produce catastrophic damages
Vigorous action needed, and soon, on climate change
Rejoining the fight against climate change is in the U.S. national interest. .