My favorite part was the global warming diss, where he says "Look, current projections are that over the next 100 years, global warming will make the seas rise a few feet and the temperature a few degrees Celsius. Many of the technologies I'm talking about could, in that same time span, quite conceivably wipe out the entire human race."

So...why we are wasting our time on it?

The Global Conference on Catastrophic Risk concluded the same thing. Global Warming may be popular, but as risks go, it's pedestrian. Not only is it limited in its impact, but it is pretty slow. A bio-engineered plague would give us days or weeks to respond. Even the fastest climate change scenarios (like the Ice Age I worry about) take years to decades.