Every day, you need to make sure to get 4,200 mg of potassium for digestion, to maintain healthy blood pressure, to carry out muscle contractions, and also for proper nerve, kidney, and heart functions.
Over the next decade, the legislation was once again amended to extend these deadlines and to mandate states to revise their implementation plans. Congress did not amend the Clean Air Act during the decade of the 1980s, in part because President Reagan's administration placed economic goals ahead of environmental goals.
Intentions, however, were not always equal to actions. Implementation of the Clean Air Amendments was made difficult by a reluctant automobile industry and the energy crisis of the early 1970s. The 1970 act gave the auto industry a temporary way out of meeting the tougher standards.