The U.S. Environmental Protection Agency (EPA) announced new proposals on May 15 to limit air pollution from petroleum refineries, a major source of air pollutants such as sulfur dioxide and benzene that cause respiratory problems and other serious health issues, including cancer. The proposed standards are intended to reduce the levels of toxic air pollution for fenceline communities (those living in close proximity to refineries) who suffer the highest air pollution exposures and related health risks. Minority and low-income populations are disproportionately represented in these fenceline communities.