Do you want all of Earth's forests and rainforests to be changed to pulp plantations, just for human needs? Well, what do you think all of the animals think about this? What if, somehow, a larger or more powerful being than humans, came here and destroyed EVERYTHING? Well, that's EXACTLY what we are doing to our planet and to the animals on it. And, furthermore, if we keep killing and cutting down trees, there will be no Oxygen. And if the trees are gone, Carbon Dioxide will not be taken in by the trees and Oxygen will not be put out. So, in conclusion, humans are killing trees, animals, AND humans.