The research delves deep into the specifics of converting to clean energy. Would it take too much land? The Stanford numbers show that you would need about four-tenths of one percent of America’s landmass to produce enough renewable energy, mostly from sprawling solar power stations. Do we have enough raw materials? “We looked at that in some detail and we aren’t too worried,” says Jacobson. “For instance, you need neodymium for wind turbines—but there’s seven times more of it than you’d need to power half the world. Electric cars take lithium for batteries—but there’s enough lithium just in the known resources for three billion cars, and at the moment we only have 800 million.”
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