Make having a pet illegal.

It should be against the law to own a pet. It is certainly immoral. Animals, birds, reptiles and the rest our not just toys for humans. And Zoos should be strictly for the support of animals that are endangered and have no where else to go.
Why do humans believe that they can just do what ever they want without regard to the morality of their actions?

Mother Earth

Human beings serve no purpose.  Even the most insignificant bug is food for something.