True, but as a society we certainly don't act like we care at all about biodiversity. The thing is though, this is not likely what will happen. It will tempora

True, but as a society we certainly don't act like we care at all about biodiversity. The thing is though, this is not likely what will happen. It will temporarily crowd out existing vegetation, which will create the conditions for new species to arise. By bringing more carbon into the soil, it will increasing fertility and with that, new forms of life can take place and in turn crowd out the pioneering 'weed', increasing rather than diminishing biodiversity. Certainly some species will be lost. This is called succession. But others will take their place. I'm not sure if Arizona will have the climatic conditions to move far beyond a desert, but that is what is happening and what we would be preventing.