Every year a lot of people cut down trees, sometimes they just cut trees for no reasons,other people cut trees for christmas and decorate their house with those trees, but they don't know that they are ending up with the trees.
Trees give oxygen,but people are just cutting down trees and if we don't have trees we would not be able to breath, so people need to stop cutting trees for christmas and start buying fakes one in that way real trees will do their job. Without trees we could all die because trees give people oxigen, and without oxygen people will die because they need to breath so they be able live and if they keep cutting