Answer:
Examples of enviromental legislation of Americans:
-Clean Air Act
-Endangered Species Act
-Montreal Protocol
-Clean Water Act
The Clean Air Act is the law that defines EPA's responsibilities for protecting and improving the nation's air quality and the stratospheric ozone layer.
Contents:
.Air Quality and Emission Limitations
.Ozone Protection
.Prevention of Significant Deterioration of Air Quality
.Motor Vehicle Emission and Fuel Standards
.Clean Fuel Vehicles
.Noise Pollution
There are a few more...
The effects will they will have to do with improving air quality and consequently an improvement in the quality of life of living beings on this planet.