The Epa has implemented regulations under the federal Caa that mandate the issuance of preconstruction and operating permits for certain stationary sources of carbon dioxide methane and other GHGs, which may pose a threat to public health and the environment. These regulations may also necessitate that certain facilities comply with aEURoe best available control technology standards set by various states or the Epa, potentially affecting REPXa's operations and the ability to obtain air permits for new or modified sources.