Why Would Skies Turn from Blue to White?

Engineers are constantly devising ingenious mechanical solutions to global warming. One is to seed the atmosphere with millions of tonnes of sulphur dioxide which, they predict, will reflect the sun’s radiation back into space. This would cause global cooling. One unpleasant side-effect would be that it would alter the spectrum of light. So we would be living under a white sky instead of our normal blue sky.

[Elizabeth Kolbert, Under a White Sky]

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