IF you can navigate some of the brainworms r/collapse should give you more than enough. Nothing changed(about the climate) from the last time I used to frequently read that sub over 2 years ago.

Some random posts, look for the climate tag.

G-20 nations provided $693 billion in support for coal, fossil fuels in 2021 — report

Europe’s climate warming at twice rate of global average, says report.

As for China maybe start with r/sino pick one.