"There is plenty of room to make a profit in a zero-carbon economy; but the profit motive is not going to be the midwife for that great transformation."

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What are the top 20 universities in the world that do good materials research that might create carbon fibers to do jet stream kites or new magnets that will allow [energy] generation to be done up there and you just bring the electricity down. You either have to bring down rotational energy, which is hard, or you have to have the generator up there and bring down the electricity. Well, putting the generator up there is hard to do because it's too heavy.

— Bill Gates