The winter of 1912 was so cold that Niagara Falls froze over.
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The winter of 1932 in the US was so cold that Niagara falls froze completely solid!
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The speed of a typical raindrop is 17 miles per hour.
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Moist air holds heat better than dry air.
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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.
11