'How can we afford to transform our whole economy in order to prevent climate change, when climate change could turn out to be a hoax or a fad and we could misallocate all that capital?,'  my answer is always the same: If climate change is a hoax, it is the most wonderful hoax ever perpetrated on the United States of America.  Because transforming our economy to clean power and energy efficiency to mitigate global warming and the other challenges of the Energy-Climate Era is the equivalent of training for the Olympic triathlon: If you make it to the Olympics, you have a much better chance of winning, because you've developed every muscle.  If you don't make it to the Olympics, you're still healthier, stronger, fitter, and more likely to live longer and win every other race in life.  And as with the triathlon, you don't just improve one muscle or skill, but many, which become mutually reinforcing and improve the health of your whole system.

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