DCZ, by Vanda M Denton, written in a multiple narrative style is a work of speculative eco-fiction featuring a London setting, released zoo animals, global control and a mysterious, powerful organisation.
Gaia can and will solve the problem of climate change as opposed to living in the ensuing disaster. And humans are not very important in the scheme of things. They will, like all else, be accounted for in the calculations as a part of a global eco-system. This is a story of reversing and preventing the problem rather than one of living with the dire consequences of it. Except from the human perspective this is a holocaust.