US considers 'sun blocking' to cool the Earth: What is it and does it really work?

A White House report confirms that the US is open to researching solar radiation modification, or sun blocking.

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Growing evidence that governments/corporations would sooner give up seeing the goddamn sun than get off even a fraction of fossil fuel usage
- to be fair, they'll probably make it block only infrared light, so the visible luminosity stays the same at first..
  
  Then they will be selling ad space on the sunshield! Remember this tweet.

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