The Epa has implemented regulations in response to the Caa's findings that suggest 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 aEURoebest available control technology standards established by states or in some cases by the Epa. These regulations may result in adverse effects on REPXa's operations and delay in obtaining air permits for new or modified sources, as monitoring of Ghgas emissions from certain sources within the United States