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

Wells of Knowledge Science

Polar Bear, Why Is Your World Melting?

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

32 pages paperback 2008

3 editions

nonfiction childrens science informative medium-paced
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In the Arctic, the summer ice is melting, making it hard for polar bears and their cubs 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 oxi...

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