If you haven't already, do yourself a favor and read the two collections by Ted Chiang Stories of Your Life and Others and Exhalation.

A Half-Built Garden by Ruthanna Emrys deals with environmental questions a lot. Humanity is starting to fix climate change when aliens come to earth to save everyone by evacuating them to their space stations. Not the best book I have read this year (too much talking really), but I keep thinking about some of its premises.