1. What was the Columbian Exchange?

2. What revolutionary effect did it have on the Americas, Africa, Asia, and Europe in the 16th century?

3. What do you see is the historical legacy of the Columbian Exchange in today’s world (besides the pizza mentioned by John Green in the video)?

please answer those questions in very easy to understand language, using very simple words. you can go to the : the columbia exchange crash course world history #23.