The earth was destroyed in an unnamed apocalypse and now humanity is trying to rebuild the surface from their underground cities. Besides the awesome - jargon-filled - world-building with fascinating tech, gadgets and ideas, there is a team of four very different main characters that take the reader first on a trip to this future earth and then on an entirely different expedition into the past. Because there's time-travel. It is one of the less paradox-prone ideas I've read and it still remains fascinating.

The characters:
Minh, the plague baby, a scientist working in Calgary
Hamid, whose provenance isn't exactly explained, also a scientist and friend of Minh
Kiki, the youngest, a so-called fat baby and research assistant to Minh
Fabian, the time travel expert and historian

The end comes a bit sudden if not that surprising and hints at future installments. The world is too rich, the characters to fleshed out to leave it at that.

Also I'd reduce my rating by half a star for the missing closure at the end. For my taste that is too open.

The world - even though set way further into the future - somehow reminds me of [b: Autonomous|28209634|Autonomous|Annalee Newitz|https://images.gr-assets.com/books/1484305104s/28209634.jpg|48237590] but I am guessing that is mostly due to the fact that this is climate science fiction.

It's a short interesting read that I'd definitely recommend checking out if you like high-tech gadgetry, climate change SF and obviously time travel.