11:17 PM
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One suggestion for energy in the future is to put huge solar power satellites into orbit around the earth. They would collect solar energy from the sun, convert it to electricity and beam it to Earth as microwaves or some other form of transmission. The power would have no greenhouse gas emissions, but microwave beams might affect health adversely. And frequent rocket launches may harm the upper atmosphere. This idea may not be practical for another century; if at all.
The picture on the right is an early and simple drawing of how a space solar power satellite would beam energy to electrical power grid on Earth.
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