Since the Chinese where the only ones who could make and sell silk, they could get a high price for their special cloth. If they had simply given their secrets away, it would have been commonplace for everyone to make, and the Chinese would have lost their giant income from the silk buyers. It would also have put many people out of a job, like the silk merchants/traders!
Rise to rights for African-Americans kept on expanding after 1877. Amid the time of Reconstruction, which kept going from 1865 to 1877, Congress passed and upheld laws that advanced common and political rights for African Americans over the South.
Amid Reconstruction, seven hundred African American men served in chose open office, among them two United States Senators, and fourteen individuals from the United States House of Representatives. Another thirteen hundred African American men and ladies held selected government occupations.
Culture is a way of life of a group of people
Government and the feelings of our people.” Yet, only fourteen months later, Jackson prompted Congress to pass the Removal Act, a bill that forced Native Americans to leave the United States and settle in the Indian Territory west of the Mississippi River.
If you are talking about the first air pollution problem its is A, almost about 100 years ago.
1955