How did the Columbian Exchange affect the environments, economies, and people of Europe, Africa, and the Americas?

New food and fiber crops were introduced to Eurasia and Africa, improving diets and fomenting trade there. In addition, the Columbian Exchange vastly expanded the scope of production of some popular drugs, bringing the pleasures — and consequences — of coffee, sugar, and tobacco use to many millions of people.

Explanation:

The Columbia n Exchange caused many things including new crops and raw resources to spread to Europe. This also caused them to find new fertile and sunny lands near the equator since most of the land in Europe was horrible since Europe was pretty far north of the equator.

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.