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:
Jackson promoted democracy by ending a bank whose only job was to support the rich and make the poor poorer.
Mercantilism was all about being self sufficient while growing economically so that meant that they needed colonies for resource exploitation. In order to get them, the countries had to fight other countries who wanted them because they all knew that the colonies would help them become the strongest on the continent.
You got food and water, you could sell your things, or tradeI hope this helps! :)
My guess on this question would be : Cold War .During Cold War USSR and USA were investing huge money in defenses and military technology to show each other they are powerful. Though its called Cold 'War' there was no war. There were no fighting. Just show.
