Polar Bear, Why Is Your World Melting? by Robert E. Wells

Polar Bear, Why Is Your World Melting?

Wells of Knowledge Science

Robert E. Wells with Robert E. Wells (Illustrator)

32 pages first pub 2008 (editions)

nonfiction childrens science informative medium-paced
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Description

In the Arctic, the summer ice is melting, making it hard for polar bears to survive. Why is the world getting warmer? The heat of the sun is trapped by the "greenhouse" gases that surround Earth--carbon dioxide, methane, nitrous oxide, and water v...

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