The United Nations just released the executive summary of their report on global warming saying they believe it is "very likely" man is responsible for a rise in the average temperature of the planet's climate. I'm all for scientific study of climate change, but I'm still not sold on the idea it's being affected by man's activities.

Ran across this story today: Against the grain: Some scientists deny (man-caused) global warming exists This really jibes with me. It makes sense, given that temperatures on Mars have risen too and there are no Ford Expeditions, Chevy Yukons, or Chinese manufacturing facilities there, that the phenomenon is natural.