Can We Measure Air Pollution Simply by Looking Up at the Sky?

If you’re not thinking about, it’s easy to overlook. But if you hone your eye, you’ll start seeing how even moderate levels of pollution change the sky around us.

Here are some tips with pictures on how can you tell air pollution by eyes.

  1. On bad days, the night sky looks red.
  2. Polluted sunlight looks a bit orange. Clean sunlight looks clear and white.
  3. Clouds look fuzzy; and the contrast of buildings against the sky is less sharp.

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