the positive effects of the Columbian Exchange were the many crops brought to the Old World from the New World. Some of these eventually became staples in cuisines around the world. These included potatoes, tomatoes, maize, sweet potatoes, cassava, and cacao, which is used to make chocolate.
The immigrants to Ellis Island were not detained on the island for very long. On the other hand, immigrants to Angel Island in San Francisco were not treated nearly as well.
