Section 112(n)(1)(B) of the Clean Air Act, as amended in 1990, requires the U.S. Environmental Protection Agency to submit a study on atmospheric mercury emissions to Congress. The sources of emissions studied include electric utility steam generating units, municipal waste combustion units, and other sources, to include area sources. The draft report includes sections on the following: an inventory of anthropogenic emissions, health effects of mercury and mercury compounds, an ecological assessment for anthropogenic emissions, characterization of human health and wildlife risks from anthropogenic emissions, and an evaluation of mercury control technologies, costs, and regulatory issues.