Answer:
have fallen by more than one-half.
Explanation:
Thick, noticeable smog in many of the cities and manufacturing centers of the United States helped bring the 1970 e Clean Air Act to spur passage at the height of the national environmental movement. The ensuing modifications were intended to enhance its effectiveness and address newly recognized problems of air pollution such as acid rain and stratospheric ozone layer damage. The Clean Air Act allows EPA to set national environmental air quality levels for certain specific and prevalent contaminants, based on the latest research, to protect public health and welfare nationally. Certain main regulations are intended to reduce the rise in emissions from increasing motor vehicle numbers and new manufacturing plants.
Lower taxes and gave food and land to the poor
During the Gilded Ages, social problems arose such as the dominated discussions with regards to the different classes such as better, dangerous and respectable classes, which arose during the development of the US into an Industrial economy. Another Social Problem was that the described overworked individuals in the Fall River was described by the owners as sc#m of the English and Irish men.
1, Cars and Trucks
2, <span>Department of Ecology
3, A</span><span>ccident at Three Mile Island
</span>4, <span>Nuclear power cannot be used to produce electricity.
5, Spotted Owl
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