How has the Columbian Exchange had an impact on our lives?

The Coloumbian exchange was the exchange of species between the Old and the New continents. Because of this we can for example choose between cofee and cacao to drink: Cofee is from the Old, and Cacao from the new World. Similarly, if you've even eaten food that included tomatoes (New world) and rice (Old World) - this is only possible with Columbian exchange.