Seventy-one percent of the Earth’s surface is covered by water. This may cause you to ask, “If there is so much water, why are people so concerned about protecting it?” First, all of the Earth’s systems interact, - Seventy - Document - PDFSEARCH.IO

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	Seventy-one percent of the Earth’s surface is covered by water. This may cause you to ask, “If there is so much water, why are people so concerned about protecting it?” First, all of the Earth’s systems interact, Add to Reading List Document Date: 2013-07-04 11:17:36 Open Document File Size: 220,40 KB Share Result on Facebook

Seventy-one percent of the Earth’s surface is covered by water. This may cause you to ask, “If there is so much water, why are people so concerned about protecting it?” First, all of the Earth’s systems interact,Add to Reading List