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Eighty-five percent of the energy we use comes from fossil fuels. That will wind down, and by and by we’re going to have to live on that 15 percent [that is not from fossil fuels] and hopefully we can grow it above the 15 percent that it is now. But that is the dimension of the challenge that we face. - http://silpol.tumblr.com/post/51363050374
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