Millions of horrified Americans have watched clear blue skies morph into thick orange fogs in recent days. While familiar to many Americans living in the western part of the country, the eerie orange hues have frightened and confounded some in regions of the nation less accustomed to the effects of wildfires.
Smoke particles from the fires allow sunlight's longer wavelength colors, like red and orange, to pass through while blocking the shorter wavelengths, like yellow, blue and green.
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