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I know that the color of the sunsets speaks volumes about pollution, but don’t know exactly what it is saying. I googled around, and, surprisingly, it looks like Hyderabad’s air is clean.
“In an exceptionally clear, unpolluted atmosphere, the colours of sunset are especially vivid. The Sun is bright yellow and the adjacent sky is shades of orange and yellow. As the Sun disappears below the horizon, the colours change gradually from orange to blue. Low-lying clouds continue to reflect the light of the Sun, even after it has vanished. Higher, thin cloud shows a tint of mauve, as the blue of the sky mingles with the red …” George Dissanaike writes in the New Scientist
You can verify the pre-sunset colors observed in Hyderabad here. The pictures from this post are of the sky without the sun.
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