Us humans don't really deserve to exist. I mean, think about it. We pollute the air with factories and cars and other automobiles, and that kills birds and other flying creatures. Also, we pollute the water, which kills fish and makes some extinct, like a dolphin in 2007 that became extinct because pollution. Other things are: Melting the ice, which makes sea levels rise, overhunting, which makes lots of species extinct, and pesticides, that are meant to kill the bad insects that chew on crops and what not, but pesticides also kill good insects, like bees, and other bugs that pollinate flowers, and also kill other insects.

Oh, and I forgot making the ozone layer bigger because of global warming.