Global warming could yet be accelerated further by the far-reaching drought in the rain forests of the Amazon, where the so-called "lungs of the world" last year produced more carbon dioxide than they absorbed. It is the second time in a decade for the phenomenon.
The drought caused many trees to wither and die. When they died, they expelled some 8 billion tons of carbon dioxide -- more than the total carbon emissions produced by the United States each year. The Independent (London) , The Guardian (London)
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