Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 3

List three important ways in which your life would be different today if grassroots actions by U.S. citizens between 1970 and 1990 had not led to the Clean Air Acts of 1970, 1977, and 1990, despite massive political opposition by the affected industries. List three important ways in which your life in the future might be different if grassroots actions now do not lead to strengthening of the U.S. Clean Air Act or a similar act in the country where you live.