Polar Bear, Why Is Your World Melting?
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Livres illustrés pour lecteurs intermédiaires
Description
Écrit par
Robert E. Wells
Publié par
Albert Whitman and Co.
In the Arctic, the summer ice is melting, making it hard for polar bears to survive. Why is the world getting warmer? The sun's heat is trapped by the "greenhouse" gases surrounding Earth—especially carbon dioxide. Robert E. Wells shows why so much carbon dioxide is going into the air and what we can do to help keep Earth cool.