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Six things you don't know about snow

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#1: Snow covers 30 percent of land on Earth.

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#2: More than 1.2 billion people rely on water from snowpack and glaciers.

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#3: Snowmelt is the main source of water for 60 million Americans.

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#4: Since 1967, 1 million square miles of spring snow cover has disappeared from the Northern Hemisphere.

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#5: 70 percent of water from the snow-fed San Joaquin River irrigates California's Central Valley.

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#6: NASA's Global Precipitation Measurement mission observes falling snow, even at the top of hurricanes.

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snow.nasa.gov