Perhelion Summer by Greg Egan
This is probably the only climate change fiction I can manage. Egan side-steps the politics of the issue by talking about a cosmic accident that screws up Earth’s orbit and stresses the hell out of civilization. The main character is one of the people trying to find solutions to problems so big the very face of the moon changes.
I resonated with Egan’s treatment of violence and blame (they’re bad) and his descriptions of courage, kindness, and forethought. Egan continues to be one of the very few authors whose books I buy as soon as they come out, and this is why.