Answer:
The correct answer is: In <u>1990</u>, Congress dramatically revised and expanded the Clean Air Act, providing EPA even broader authority to implement and enforce regulations reducing air pollution emissions. (...)
Explanation:
On November 15, 1990 the Clean Air Act was revised in a major effort to strenghten and help ensure better compliance with the Act. The 1990 Amendments were designed to have better response to 4 threats to the environment: acid rain, toxic air emissions, urban air pollution and stratospheric ozone depletion.
Answer:
Exclusion from office of ex-Confederate officers who had served during the Civil War.
Oregon Fever
At that time, promoters and propaganda spread the news to the people across the nations that the area surrounding Oregon were filled with unclaimed natural resources and cheap lands.
After hearing this news, many people see this as an opportunity to opened up a business and obtain better a better life. This caused many farmers, miners, and ranchers tried to make heir way to Oregon which located on the northwestern part of United States.
