why was 1990 an important year regarding air quality?\nthe united states took first steps to keep the air…
why was 1990 an important year regarding air quality?\nthe united states took first steps to keep the air clean.\nthe united states created the environmental protection agency.\nmodifications and improvements were made to the clean air act.\nfunding was established under the clean air act to study air pollution.
Answer
Answer:
Modifications and improvements were made to the Clean Air Act.
Brief Explanations:
In 1990, significant amendments were made to the U.S. Clean Air Act to address air - quality issues more comprehensively, such as dealing with acid rain, ozone depletion, and toxic air pollutants. The first steps to keep air clean in the U.S. were earlier, the EPA was created in 1970, and while funding for air - pollution study may be part of the Act, the key event in 1990 was the Act's modifications.