Introduction Environment law can be defined as a cluster of laws that contain elements that have power over human activities on the earth and public health. It has diverse obligations and prospects that can be put into practice in addressing collective impacts and susceptible populations. For instance, Clean Air Act protects city residents from air pollutions. This paper will provide detailed information on how Clean Air Act came into formation and its impact on eradication of pollution (Wood, 2000). Provisions of CAA Clean Air Act (CAA) is a law that was drafted by the federal government of America with the intention of protecting the Americans from breathing in contaminated air. Currently, it plays a significant role in regulating air emissions from both stationary and mobile devices. In addition, CAA also authorises EPA to form NAAQS that protects both public health and public welfare from hazardous air pollution (Belden, 2001). Reasons for introduction of CAA The origin of CAA dates back to early 1950s. It was signed into law by President Eisenhower in July 1955. However, its core provisions were signed by the congress in 1970 (Davidson and Norbeck, 2011). In 1970, the federal formulated procedures that were to be used by EPA in setting up national standards for preventing air pollution. For instance, it was assigned the duty of reducing emissions from new automobiles by 90%. EPA was also allowed to establish new performance standards. The standards will aid in determining the amount of pollution that was to be emitted by different industries in diverse regions. In the amendment of 1970, CAA also encouraged states to come up with plans that could aid in reducing air pollution. It was amended in early 1977 and 1990 in order to elongate the deadlines and to denote on new policies for keeping the air clean (United States, 1981). For instance, the amendment of 1975 required EPA to come up with programs that will not only aid in regulating emission of air toxins, but also strengthen federal enforcement authority. CAA obliges the U.S Environmental Protection Agency (EPA) to come up with quality national health standards in order to eradicate pollutants such as smog, carbon (ii) oxide, and nitrogen (ii) oxide. In addition to enforcing state governments into coming up with cleanup plans for the environment, it also requires EPA to enforce nations into setting up national standards for major sources of pollution such as automobiles and electric power plants. In addition, it also authorises discharge controls of over 180 hazardous air pollutants, set ups a program that curbs the production of acid rain and recommends for the prevention of deterioration of clean air. CAA also implements programs such as Montreal Protocol to eradicate most of the ozone depleting chemicals. Economic impacts of CAA Just as in the past, Clean Air Act plays a significant role in protecting the citizens of America from air pollution. America is one of the nations in the world that records few cases of premature deaths and illness. With few cases of deaths and illness, it is evident that America allocates little amount of money towards health issues. It is also evident that the productivity of American workers is recommendable. Thus, t