We live on a water planet. From millions of miles away, Earth shines blue, with almost 70% of its surface covered in water. But most of that water is in the oceans, and it's salty. On earth, only about 3% of water is fresh - the stuff we drink and use to feed our crops - and it's constantly moving and changing. Watch this video to see Earth's changing freshwater as tracked by a fleet of NASA satellites.
Top image: Screenshot from the video.
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