As an aside, there is a bit of a disconnect in how the west interpret's China as "not caring" whenever China doesn't make a lot of noise about publicly fixing something. The party can care, but decide something gets less priority, and put it in their backlog, the same way a project manager can!

Air quality and industrial pollutants are a good example. Right now, China is prioritizing industrial expansion and energy stability until they hit whatever targets they have in mind. They'll be talking about carbon and pollution publicly once they can shut down their coal plants without destabilizing the grid.