Climate change is a global issue - from the point of view of the Earth's climate, a molecule of CO2 emitted in Bejing is the same as a molecule emitted in Sydney.

Geoengineering - the deliberate, large-scale manipulation of the earth's climate to offset global warming - is a nightmare fix for climate change.

Obama's record on climate issues is not all bad.

Bloomberg is famously impatient with beltway politics and believes that to get anything done you need to work from the ground up.

It's not all Obama's fault: His plans to rebuild America's energy infrastructure have been hampered by the recession, and his efforts on global warming have been stymied by Tea Party wackos and weak-kneed Democrats in Congress.

Some studies have shown that natural gas could, in fact, be worse for the climate than coal.

Although most Americans don't know it, the U.S. gets more oil from Canada than it does from the entire Middle East.