<span>A. It established federal emissions standards
</span>The enactment of the Clean Air Act of 1970 (1970 CAA) resulted in a major shift in the federal government's role in air pollution<span> control. This legislation authorized the development of comprehensive federal and state regulations to limit </span>emissions<span> from both stationary (industrial) sources and mobile sources.</span>
Answer:
Immigrants chose to come for various reasons, such as to live in freedom, to practice their religion freely, to escape poverty or oppression, and to make better lives for themselves and their children. Some people already have members of their family residing in this country, and desire reunification.
Explanation:
John C. Calhoun--------hope this helps... rate me brainliest
Answer:
I will explain him briefly about the residential schools
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Answer:
Economists are important because they study a certain resource and figure out how to distribute it to others to get as well.
Explanation:
For example, An Economist might be studying a very scarce resource. This resource is something that is needed in everyday life. What an economist will do is find a way to make sure this resource is available to everyone. They could so this by creating another version of it or a different kind of it to distribute. Then they are helping the economy.
