Katrina was only a category 3 hurricane and it had nothing to do with global warming. Its severe results tell us more about political corruption and incompetence than they do about the climate.

Global warming will likely decrease the strength and number of hurricanes. Hurricanes are not caused by high temperatures; they're caused by differences in temperatures. And the consensus is that most warming will occur in the polar regions--that means global temperatures will become more uniform.

The guy in the video assumes that one of the costs of inaction is political upheaval and possibly wars. But that's also a cost of alarmism.

The Third World is being told to hate the evil developed countries--especially the U.S.--over something that has not happened, may never happen, and if it does happen, may not be anyone's fault.