The Clean Air Act and comparable state laws and regulations limit the emission of air pollutants from various sources and impose different monitoring and reporting requirements. These laws may require Greylock Production to obtain pre-approval before constructing or modifying projects or facilities that are anticipated to significantly increase air emissions, as well as to meet stringent air permit or regulatory requirements, or use of specific equipment or technologies to control emissions. Obtaining permits may delay the development of Greylock Productiona properties.