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Question Nine: John Barrow of Georgia. What do you say to people who argue that natural emissions overwhelm man made emissions in the greenhouse warming problem?

Answer Nine: Natural emissions--like volcanic emissions--are heavy particles and settle back out of the atmosphere quickly. CO2 is the problem.

Update:

Question Ten: Fred Upton (R-Auto Industry) You've been a bit down, haven't you, on nuclear energy? Yes? Yucca Mountain? What about all the new coal plants in China?

Answer Ten: I'm not a critic of nuclear energy, I'm just a skeptic of its viability in the market. True, China's five year plan--55 coal fired plants per year, and only three nuclear per year, but they see the same problems down the line as we do. So I'm all for nuclear power, but we need to address operator error and we can't build plants or store fuel when experts say it's a terrible danger.