Pollution, litter, and cars
Answer:
emigration or increase in death rate
Explanation:
emigration is leaving ones place of living, which would explain why the population is going down, and an increased death rate means more individuals are dying than the birth rate can keep up with, so the population would be going down as well. so, the answer is number one.
Real GDP per capita for the United States is calculated by dividing real GDP by the number of people living in the country.
Answer: The term color line in history means racism. This term was used to reference racial segregation that existed in the United States after the abolition of slavery.
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