Early next year, dozens of huge, concave mirrors will begin to sprout on a desert farm northeast of Los Angeles. Each 37-foot-diameter Stirling dish will electronically track the sun and reflect its rays onto a heat collector, where the concentrated sunlight will superheat hydrogen to 1,300
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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For what purpose is this being done? I must raise concerns that we continue to look to the sky for solutions when there is so much we can do to improve lives on earth.
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