Researchers: Warming May Change Amazon

A boat is seen in the Tapajos River, near the Amazonia National Park in the northern state of Para, Brazil, April 29, 2006. Researchers say Global warming could spell the end of the world's largest remaining tropical rain forest, transforming the Amazon into a grassy savanna before end of the century. (AP Photo/Andre Penner)

(AP) -- Global warming could spell the end of the world's largest remaining tropical rain forest, transforming the Amazon into a grassy savanna before end of the century, researchers said Friday.

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