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Biology 15 Online
OpenStudy (anonymous):

Why is Earth oftened referred to as the blue planet? The hydrosphere looks blue and covers three-fourths of the earth's surface Most people like blue. The sky is blue. When viewed from space, the biosphere always looks blue.

OpenStudy (anonymous):

@gottennis121 @EclipsedStar

eclipsedstar (eclipsedstar):

I thought you answered this one earlier? :D

OpenStudy (anonymous):

D

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