In an effort to combat climate change, individuals have dreamed up all sorts of ideas; like an array of umbrellas that would cast an even shadow over the earth...So while self-tan sales would go up, what exactly are the plants supposed to do - take a vacation from photosynthesis?
It's about as ambitious as Tsiolkovsky's Space Elevator. And while both would be very expensive projects, at least the space elevator would be useful in the long run.
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