White House adviser Carol Browner said the Obama administration still backs a "comprehensive energy reform" for the entire U.S. economy and not a limited approach that would only cover greenhouse gases released by the utilities sector. Sen. Richard Lugar, R-Ind., who supports a more modest measure to curb emissions, has ordered his staff to gather more data on the plan, which could include giving incentives to the forest and agricultural businesses for soaking up carbon from the atmosphere. The Environmental Protection Agency is also pursuing a separate strategy that would regulate emissions from sources including vehicles and power facilities.

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