I'll preface by saying I really enjoyed KSR's Mars novels in large part because they feel like a very believable medium-near future.
Sadly, 'Ministry' starts strong but takes the easiest and least-believable route to solving the climate crisis. A young man is traumatized by a deadly heat wave and pushed to holding the head of the UN's new climate taskforce hostage to make her take more decisive action against the individuals killing the planet -- bankers, capitalists, industrialists, etc. Same UN taskforce apparently has a black wing committing sabotage and, it's implied, assassinations to force the powers that be away from fossil fuels.
KSR identifies the people and organizations perpetuating the crisis, and there's an exciting, compelling novel buried somewhere in here about ecoterrorists, organized communities, and rogue government officials going up against said people and organizations.
Unfortunately the second half of the novel largely abandons these ideas and allows the magic of blockchain (which is not explained to people unfamiliar with the tech, only deployed as a surefire way of ending financial loopholes and mismanagement) and a carbon sequestration-based currency to incentivize all the capitalists to divest from fossil fuels. Grassroots pressure, worker organizing, and the black wing's extralegal tactics are given a fraction of the attention as financial reforms, and their overall impact in achieving the novel's optimistic outcome is never explored.
The last third or so of the novel is mostly about how much KSR likes hanging out
in Switzerland.
I'd have loved to read a story about Frank and Badim -- the radicalized young man and the leader of the Ministry's black wing -- but instead the main perspective is top-down, that of the Ministry head who receives reports of how other people and groups are doing the work.
The first few chapters I was thinking Obama had some nerve recommending a book about the dire need for bottom-up organization and even sabotage tactics in the fight against capitalism. By the end I understood that the novel hopes that the capitalists can be convinced to reform themselves.