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Oceans Quiz

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Oceans

Overfishing and global warming threaten to leave Earth's oceans barren.

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Quiz: Global Warming

Global warming is a complex issue that involves many different environmental factors. Think you know the ins and outs of global climate change?

Photo: Flowers bloom near Siberia's Sayan Mountains

Quiz: Going Green

From PV cells to CFLs, there's a lot you can do to help reverse global climate change and live a more eco-friendly life.

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