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In a statement, EPA said: “EPA looks forward to working with USDA and the designer of this particular computer model to continue improving the analytical tools that all of (us) use to predict the ways that different climate policies would affect agriculture.”

Allison Specht, an economist at the American Farm Bureau Federation, said that the results of the EPA and Agriculture Department analysis have been largely confirmed by other studies.

“That’s one of the realities of cap-and-trade legislation. The biggest bang for your buck for carbon credits is planting trees,” she said.