Earth has been around for about 4 billion years. Us humans have been around for only about 200 thousand years. Compared to how long Earth has existed, humans have only been here a very small percentage of the total time. But humans have definetly made the most impact on Earth. We are using up natural resources at a frightening rate. We are destroying the Earth and we need to change our ways. We are not the only things on this Earth and we need to learn how to share.