U.S. EPA has issued a final rule for the mandatory reporting of greenhouse gases from four additional sources: magnesium production, underground coal mines, industrial wastewater treatment, and industrial waste landfills.
Moreover (from the press release): "In a separate proposed rule, EPA is requesting public comment on which industry related GHG information would be made publicly available and which would be considered confidential. Under the Clean Air Act, all emission data are public. Some non-emission data, however, may be considered confidential, because it relates to specific information which, if made public, could harm a business’s competitiveness." (Emphasis is ours.) For more on that rule, see here.