Because they made things for cheaper so you would make more profit if you made things in china.
Strip cropping helps to stop solid erosion by creating natural dams for water, helping to preserve the strength of the soil.
I think Hinduism spread to both religions
The Columbian exchange, also known as the Columbian interchange, named for Christopher Columbus, was the widespread transfer of plants, animals, culture, human populations, technology, diseases, and ideas between the Americas, West Africa, and the Old World in the 15th and 16th centuries.
