How is Rain Formed

About 97 percent of the earth’s water is held in the oceans. The rest is, for the most part, locked up in glaciers or stored in lakes and aquifers. Of course, ocean water is not drinkable.Before ocean water becomes drinkable, it takes a long, complicated journey. First, it evaporates, becoming a gas—water vapor. Every year, heat from the sun draws up about 95,000 cubic miles [400,000 km3] of water from land and sea into the atmosphere. The atmosphere itself is “a system of almost unbelievable complexity” that extends more than 250 miles [400 km] into…

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