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You are asking what his major accomplishments were / what he was known for !

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1-A 2-A 3-D 4-A

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Answer:  Some human interactions that pollute Rivers are Inadvertent and deliberate discharge of petroleum, improper sewage disposal, and thermal pollution also are seriously affecting the quality of the hydrosphere. The present discussion focuses on three major problems—eutrophication, acid rain, and the buildup of the so-called greenhouse gases.

Answer: Inadvertent and deliberate discharge of petroleum, improper sewage disposal, and thermal pollution also are seriously affecting the quality of the hydrosphere. The present discussion focuses on three major problem eutrophication acid rain and the buildup of the so called greenhouse gases.

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The American Indian Removal policy of President Andrew Jackson was prompted by the desire of White settlers in the South to expand into lands belonging to five Indigenous tribes. After Jackson succeeded in pushing the Indian Removal Act through Congress in 1830, the U.S. government spent nearly 30 years forcing Indigenous peoples to move westward, beyond the Mississippi River.

In the most notorious example of this policy, more than 15,000 members of the Cherokee tribe were forced to walk from their homes in the Southern states to a designated territory in present-day Oklahoma in 1838. Many died along the way.

This forced relocation became known as the “Trail of Tears” because of the great hardship faced by Cherokees. In brutal conditions, nearly 4,000 Cherokees died on the Trail of Tears.