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Published March 29, 2011, 08:23 AM

What can farmers do about climate change?

KNOXVILLE, Tenn. — There was a time when one legitimately could argue that there was a lack of scientific agreement over the issue of the role of humans in global warming and even whether we were in a cooling or warming period. Now, it is increasingly difficult to ignore the scientific evidence.

By: Daryll E. Ray and Harwood D. Schaffer,

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