Circumhorizontal arcs (loosely known as fire rainbows) are the rarest of all naturally occurring atmospheric phenomena.
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Snowiest city in the U.S. : Blue canyon, California.
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Moist air holds heat better than dry air.
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The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
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Rain contains vitamin B12.
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It snows more in the Grand Canyon than it does in Minneapolis, Minnesota.
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Dirty snow melts faster than clean.
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Carbon dioxide is a trace gas and by itself will produce little warming. Also, as CO2 increases, the incremental warming is less, as the effect is logarithmic so the more CO2, the less warming it produces.
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