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.
Answer:
C
Explanation:
It established rules of modern warfare
Answer: The Model T brought mobility and prosperity on an undreamed of scale through manufacturing efficiencies at a price that anyone could afford. The moving assembly line created the mass-production process, which influenced the “machine age.” It also enabled Ford to steadily decrease the price of the Model T. Explanation:please mark me brainliest
Answer:
They were expected to stay at home.
Explanation:
Women were more likely to stay home, take care of children, cook and do chores, while the men performed all the hard work.
