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The National: Scientists aim to dim the sun to tackle climate change

"Scientists are preparing to test a radical new way of tackling climate change by deliberately dimming the sun. A team of researchers from Harvard University plans to release a balloon into the skies over the southwest United States in the new year. Once it reaches an altitude of 20km, the balloon will release a chalky material to bounce the sun’s heat back into space. Only a tiny amount of material will be released, and the effects will be limited to a few square kilometres. Even so, the experiment has reignited concern about such “geoengineering” solutions to tackling climate change."

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