Very pertinent questions, Taylor, and all of them need to be answered by action starting right now.
But in a very general answer: There are many people and organizations 'sticking up' for Planet Earth. For example: politically, all of the various Green Parties around the world. Then there is a multitude of scientists, conservationists, environmentalists, the lists is almost endless.
Trouble is they have so far made little inroads against the huge multi-national corporations who are more concerned with short term goals such as making lots of money for their shareholders and keeping the massive salaries of their top executives.
There are still a lot of people in power who just refuse to believe we human beings are stuffing up the world on which we live. This, despite overwhelming evidence.
However, the change to save us from ourselves is on the upswing. Whether it will have enough momentum to 'turn the tide' of crass materialism for materialism's sake is, of course, entirely up to us. And that means EACH of us.