It doesn’t need saving. Earth will be here long after Homo Sapiens Sapiens has departed. Most likely it will teem with life for sometime–as in billions of years–after it no longer teems with us. This will be the case not matter what our last chapter is about.
…just my opinion, but all efforts to transform and develop the human situation in the biosphere, might better be oriented by a much more refined and grounded regard of what actually may come to be saved and needs to be saved.