Think on a 50-year scale, which is a much more natural time-scale for global warming. The US is right now spending about 200 million dollars annually on research into renewable energy.

On average, global warming is not going to harm the developing world.

The second thing is, if you want to do something about global warming, you have to think much more long-term. There is something wrong with saying we should start using renewables now, while they are still incredibly expensive.

So it's mainly a question of helping the Third World overcome the effects of global warming.

Preventing global warming from becoming a planetary catastrophe may take something even more drastic than renewable energy, superefficient urban design, and global carbon taxes.

Global warming is real - it is man-made and it is an important problem. But it is not the end of the world.