From 1522, Hernan Cortez, the leader of the of the Spanish conquest, started importing European livestock into the Americas. Livestock like cows, dogs, sheep, pigs and horses were brought in and introduced to the natives. Unfortunately, the animals ruined the environment that the native slaves had to tend. They also brought in diseases that the Aztecs had no knowledge of. Many died because of the sicknesses that they caught. On the other hand, the Columbian Exchange brought in 'new world' goods from the Americas across to Europe. The Europeans became healthier through their diet of new foods. Goods like wheat, grain, barley, coffee, pear, olive, sugar cane, onion and grape were introduced into the Americas, as part of the Columbian Exchange. In return, 'new world' crops like tobacco, pumpkin, turkey, pineapple, cacao, potato, tomato, corn and vanilla were exported into Europe. This new produce benefited the Europeans' lives through their health.
