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Namibia's Checkered History of Conservation
Snapping turtles look to suburban gardens to lay eggs as their habitats are increasingly threatened.
The final round of the National Geographic Bee is Thursday; see how you do on sample questions.
Traditional herders worry that mines will siphon off already dwindling water supplies in the Gobi.
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Who are the biggest carbon polluters today? Who will it be in 2030?
The basic idea: Let rich countries pay poor ones to save and even expand carbon-absorbing forests.
Farmers hope money they make from capturing greenhouse gases would make up for the lost acreage.
Many of the world's major greenhouse gas emitters are forging their own plans to cut emissions.
An animated Robert Krulwich chemistry lesson -- in five episodes.
See what climate change could do to a coastline near you.
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