Answer:
1940s and 50s when when the Veitnam was started
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 it prevented European countries from taking advantage of China's resources
Explanation:
Because China had things that everybody wanted so america said "no" for china
Answer:
Europeans' enslavement of Native Americans began with Columbus. As the governor of Hispaniola, he forced the Taino Indians to labor in the Spanish fields and mines, and he brought Taino slaves to Spain on his return journeys. About 50,000 Taino died within two years of Columbus's arrival, and by 1510 the Taino population had declined by nearly 90%, primarily from European diseases but also from brutal treatment. A new source of forced labor was required. In 1518 the Spanish king allowed the importation of slaves directly from Africa (previously they had been Spanish-born Africans), and the Atlantic slave trade to the western hemisphere began in earnest, finally ending over three centuries later with the abolition of slavery in Brazil in 1888.
Explanation:
Early humans were most likely the natives and british they discovered most of our land we have today
