The Clean Air Act Amendments

189 Hazardous Air Pollutants (HAP) are included in the amendment to the Atmosphere Remediation Act (CAAA) in 1990, but these are considered to be harmful to human health and the environment, mercury and its compounds are most important It is one of the pollutants. . CAAA requires the US Environmental Protection Agency (EPA) to conduct research on mercury emissions including research on electric steam generators. In 1997, the US Environmental Protection Agency analyzed mercury emissions from power plants and announced to the Congress a mercury investigation report that studied control technology.

On 1 March, the US Environmental Protection Agency announced a comprehensive parliamentary compulsory investigation on costs and benefits of the amendment of the Air Pollution Control Act 1990. This large revision of the 1970 Air Pollution Control Law (also revised in 1977) has set a new plan. Manage consumption of acid rain and stratospheric ozone. This amendment also strengthened and tightened the existing aspects of the bill, improved licensing requirements, and reformed the hazardous air pollutant control program. The study was widely reviewed by a respected panel of external experts (he stated the cost-benefit analysis of the study as "most advanced") 20, and the research found that the modification is very beneficial . The central cost benefit estimate of this survey was due to the amendment to the Atmosphere Cleaning Act in 1990, there was a ratio of net income ($ 2006) of $ 1.2 trillion and a ratio of profit to expense of 25: 1 in 2010 It is that.

After the revision of the Air Pollution Control Law in 1990, the pollution tax and licensing market became a priority tool for environmental regulation. The license market was used in the United States as early as the 1970s, but the revision of the Air Pollution Control Law in 1990 began when the popularity of this type of regulation became popular, and the domestic sulfur dioxide emission license market Establishment and legal requirements were sought. In the United States, we install a filtration system (or "scrubber") in the chimney and use low sulfur coal to reduce sulfur dioxide emissions. To reduce ozone-related emissions in consideration of various nitrogen oxide (NOx) emissions and spans, such as the NOx emissions budget of the Clean Air Incentive Market (RECLAIM) in the California region and the Ozone Transportation Committee established in the Los Angeles basin , Other programs are also used. 12 states in eastern United States