I've found several answers to the question of why the sky is blue.
Basically the title. Elaborate however you want...

  • $\begingroup$ if you google this you get 1,6 billion hits,what more do you want? $\endgroup$ Jul 8 '18 at 9:01
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    $\begingroup$ In short: the scattering of light. Ozone offers some protections against UV light. $\endgroup$
    – Fred
    Jul 8 '18 at 9:22
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    $\begingroup$ I'm voting to close this question as off-topic due to insufficient research. $\endgroup$ Jul 8 '18 at 21:09
  • 1
    $\begingroup$ I think the reason for the question is that Google gives some wrong results (Ozone layer) as well as the right one. It's clearly earth science, and I encourage somebody to put time into a good canonical answer. $\endgroup$ Jul 9 '18 at 7:09
  • $\begingroup$ Answered at earthscience.stackexchange.com/questions/3063/… $\endgroup$ Jul 9 '18 at 19:11

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