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.
The American Labor unions respond to the production demands
of the World War II by which they granted the government request in which they
uphold and pledge that they will not strike in which it could be seen that they
respond to the production demands that had occurred in the World War II.
Answer:
New Technologies promote urban subsistence and a modernized mass society emerges. Changes in State education boost literacy meters; African Americans struggle to end legalized differentiation. Progress in science and technology aides answer Urban difficulties, including congestion, unsanitary situations, and death.
Explanation:
The popularity of bicycling and entertainment parks revealed an attention in recreation activities aim of the 1900s. The foundation of cycles affected females because it gave them think more confident. Western venture stories were a kind of fiction very famous throughout the curve of the 20th century. New Urban Environments supported feminist activism; Millions of females served outside of the house proceeded to demand polling advantages, enhanced operating in civil reform movements, such as abstinent women’s Temperance Movement.
