QUICK Why was 1990 an important year regarding air quality?
The United States took first steps to keep the air clean.
The United States created the Environmental Protection Agency.
Modifications and improvements were made to the Clean Air Act.
Funding was established under the Clean Air Act to study air pollution.
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Answer: The year 1990 was an important year because the Modification and Improvements were made to the Clean Air Act. The modification made were to control acid rains and for the issuance of stationary source operating permits.
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