Answer:
cut down on fossil fuels and green house gasses
Explanation:
they are thickening the atmosphere so when the Suns rays enter earth they can't escape
Answer: D. it lies in a valley, surrounded by mountains, that traps in air pollutants over the city.
Explanation: Being in a valley results in air pollution being contained to an area.
Answer:
Strictly implementation of laws and punishment.
Explanation:
Strictly implementation of laws and punishment to those who forbid the law were the steps the government took to free slaves and restore the rights of African Americans after the civil war. The Thirteenth Amendment (1865) ended slavery all over the United States, the Fourteenth Amendment (1868) provides American citizenship to the African Americans, and the Fifteenth Amendment (1870) guaranteed the right to vote to African Americans.
C.) Houston should resign from the state government.
476 CE this is when it collapsed