The Epa has implemented regulations in response to the Caa's findings that suggest the emission of carbon dioxide, methane, and other greenhouse gases could endanger public health and the environment. These regulations require preconstruction and operating permits for certain stationary sources, which require certain facilities to comply with aEURoebest available control technology standards established by states or in some cases by the Epa. These regulations may have adverse effects on REPXa's operations, restrict their ability to obtain air permits for new or modified sources, and require monitoring of Ghgas emissions from certain sources within the United States