On June 30, 2015, 46 U.S. Senators sent a letter to the EPA, U.S. Department of Energy (DOE), and USDA stating that "[f]ederal policies across all departments and agencies must remove any uncertainties and contradictions through a clear, unambiguous message that forest bioenergy is part of the nation's energy future." Senator Susan Collins (R-ME) and Senator Jeff Merkley (D-OR) headed the letter and pointed to the recognized carbon neutrality of forest biomass as a renewable resource and asked that the federal government consistently recognize the energy source when making regulations to reduce emissions.

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