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Earth

  • How did Earth get its name?
  • How much water does Earth have?
  • How thick is Earth's ozone layer?
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How much water does Earth have?

There are more than 326 million trillion gallons of water on Earth. Less than three percent of all this water is freshwater and of that amount, more than two-thirds is locked up in ice caps and glaciers.


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Cool Cosmos is an IPAC website. Based on Government Sponsored Research NAS7-03001 and NNN12AA01C.