The Epa has implemented regulations in response to the Caa's findings that the emission of carbon dioxide, methane, and other greenhouse gases poses a risk to public health and the environment. These regulations require preconstruction and operating permits for certain stationary sources, which require certain facilities to comply with aEURoe best available control technology standards established by the states or in some cases by the Epa. These regulations may affect REPXa's operations and delay REPXa's ability to obtain air permits for new or modified sources.