Left: All the water in the world (1.4087 billion cubic kilometres of it) including sea water, ice, lakes, rivers, ground water, clouds, etc. Right: All the air in the atmosphere (5140 trillion tonnes of it) gathered into a ball at sea-level density. Shown on the same scale as the Earth.::Dan Phiffer, via ::reddit
See also: ::Chinese Water: A Picture is Worth..., ::A Picture is Worth... Air Pollution in China
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