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| Description: Regulations designed to improve air quality have made a substantial impact on the lives of people in the United States and Canada. - 1970 Clean Air Act - Clean Air Interstate Rule - Cross-State Air Pollution Rule Picture Stats: Views: 198 Filesize: 45.37kB Height: 494 Width: 589 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=31068 |