The Biggest Control knob, CO2 in the Earth's Climate History.

Notable quotes from the speech above...

If higher carbon dioxide warms, earth's climate history makes sense, with carbon dioxide having caused or amplified the main changes.
If carbon dioxide does not warm, we must explain how radiation physicists are so wrong and how a lot of really inexplicable events happened over earth's history.

The argument deniers make is what's called a logical fallacy: If the data shows that temperature does not track CO2, then CO2 must not be responsible for warming the Earth's climate. Correct logic: CO2 is the only validated explanation of trapping warmth on the Earth, yet sometimes there are variability in the correlation between CO2 and temps, therefore other factors must be diminishing the effects. What we're learning now is the release of pollution and particulates into the air has a cooling effect often called "global dimming." As we get better about cleaning up pollution, which is a good thing because of the negative health effects, we're actually going to remove the dimming factors too. In other words, increases in temperature have been artificially muffled...so the warming is going to be a lot worse than we actually thought because of global dimming.



We're running out of time. The Earth is going to be fine. As George Carlin says, it's the people that are fucked.