Against the Machine: Evolution by Brian Van Norman

Earth, 2212: The novel, third in the Against The Machine trilogy, yet free standing on its own, tells of a dystopian society in the midst of catastrophic climate change. Billions have died. The minority of people remaining inhabit the MEGs, former cities transformed by technology into huge protective domes; outside is the MASS living by subsistence. All seems well for those in the CORPORATE. It is not. With worsening climate, the MASS increasingly restive and their AI Silicons becoming sentient, those at the top have concocted a final to leave Earth for Alpha Centauri, destroying the planet in their wake. Four protagonists, each from separate segments of this world, come together to attempt to prevent the plan. By the end they have managed to alter the human/machine interface, so changing human evolution.