On April 2, the Environmental Protection Agency (EPA) released a proposed rule to revise global warming potential values that industry stakeholders use to calculate annual greenhouse gas emissions for reporting standards. The values, listed in Table A-1 of the reporting rule, would increase the global warming potential for methane and would add 26 fluorinated greenhouse gases to the list. The goal of the revision is to better reflect the values in the Intergovernmental Panel on Climate Change’s Fourth Assessment Report which was released in 2007.