Hell no, we need MORE people, and we need them to want to get the hell off of this doomed rock. So we have lots and lots of people to send out in to space and make a new home of all of that mess. Every animal and plant that does not get taken with us will die off, conservation is a non issue, especially since nothing is static. Our desire to "conserve" thing's is contrary to evolution, and is a work of massive egotism based on jesus-ey ideas about the natural world. We need to make this place so damned miserable that everyone wants to leave it....or our species is doomed too.