The Union Pacific and Central Pacific railroads connected in Utah.
African Americans.........................................................
Plant and animal kingdoms.
These are in both the systems.
Answer:
China.
Explanation:
A study by researcher Ahn joon-young found that the closer you get to china, the worse the pollution becomes.
The European slave trade began with Portugal's exploration of the west coast of Africa in search of a sea trade route to the East. The East had new resources, like spices and silk, and the Portuguese were hoping to acquire these goods without the hard journey by land from Europe to Asia.
