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:
it was written in very plain language that was easy to read.
Explanation:
The Spanish-American War was notable not only because the United States ... Spain had dominated Central and South America since the late fifteenth century. ... of additional naval bases in the Pacific Ocean, reaching as far as mainland Asia. ... best known part of the battles, but in fact, several African American regiments
In the final days of the Second World War, on Aug. 6 and 9, 1945, the U.S. dropped atomic bombs on Hiroshima and Nagasaki. Despite U.S. claims to the contrary, these actions were neither justified nor decisive in Japan's surrender. ... The First World War, “the war to end all wars” ended in 1918.
