Products like potatoes, tomatoes, chocolate and tobacco have become part of our daily lives. But it is only since the discovery of America by Christopher Columbus that these products have been introduced to our regions. After this discovery, Colombian trade began: products were transported from the New World to the Old World and vice versa. It must be said that this exchange had a huge impact on the world: without the Colombian exchange, the world would have been very different. In his essay, Charles C. Mann (2007) said: “This is arguably the most important event in the history of life since the death of the dinosaurs. » First, the Columbian Exchange dramatically transformed the American ecological environment. Charles C. Man (2007) explained that due to the success of Rolfe's tobacco plantation in Jamestown, English earthworms were transported from the Old World to the New World. These worms having disappeared from the American continent, these insects caused a lot of damage by eating the litter located under the trees. When it rained, all the nutrients the trees needed to survive were rented out. As a result, many trees died and the landscape became more open than before. However, worms are not solely responsible for radically changing the American landscape. Additionally, the settlers themselves transformed the authentic landscape by shipping their domestic animals, completely unknown to the Native Americans, to the New World. Before the arrival of settlers, the American environment consisted of large tracts of cleared land as the Indians burned the bush to keep the land open. When settlers arrived with their livestock, they began building fences to make the area more civilized, but many animals managed to eat the Indian crops. Third, the European bee has also had an impact on the