介绍大气清洁法案clean air act.pptx

Clean Air Act;The Clean Air Act is a United States federal law designed to control air pollution on a national level. It requires the Environmental Protection Agency (EPA) to develop and enforce regulations to protect the public from airborne contaminants known to be hazardous to human health.;HISTORY;Major amendments;President Lyndon B. Johnson signing the 1967 Clean Air Act in the East Room of the White House, November 21, 1967.;The Clean Air Act of 1970 (1970 CAA) authorized the development of comprehensive federal and state regulations to limit emissions from both stationary (industrial) sources and mobile sources. ;The 1977 Amendments primarily concerned provisions for the Prevention of Significant Deterioration (PSD) of air quality in areas attaining the National Ambient Air Quality Standards (NAAQS). ;Another set of major amendments to the Clean Air Act occurred in 1990 (1990 CAAA). The 1990 CAAA substantially increased the authority and responsibility of the federal government. New regulatory programs were authorized for control of acid deposition (acid rain) and for the issuance of stationary source operating permits. ;Enforcement of the act’s provisions have long been controversial with some sectors of the auto and utility industries. However, according to an April, 2011 EPA study, the direct benefits from the 1990 Clean Air Act Amendments are estimated to reach almost $2 trillion for the year 2020, a figure that dwarfs the direct costs of implementation ($65 billion). The Clean Air Act was also significant in that it was the first major environmental law in the United States to include a provision for citizen suits. ;That’s allThank you!