"A wild idea to combat global warming suggests creating an artificial ring of small particles or spacecrafts around Earth to shade the tropics and moderate climate extremes."
I can't help but feel that by the time we have the economic and technical mettle to construct a shady ring in orbit around the planet we'll have embraced some form of clean energy. But I could be wrong; things could get so bad that we're forced to adopt a tactic like this to keep Earth livable. (Of course, if it gets too bad, we're not going to be around to do anything about it anyway.)
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