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For example the new nuclear doctrine:
The doctrine now says an attack from a non-nuclear state, if backed by a nuclear power, will be treated as a joint assault on Russia.
https://www.bbc.com/news/articles/cj4v0rey0jzo
and a Russian lawmaker, when the EU parliament voted to allow all kinds of weapons to be send to Ukraine:
What the European Parliament is calling for leads to a world war using nuclear weapons
The solution for that problem are carbon tariffs. As in every product imported has to pay X money for every ton of carbon they emitted producing the product.
Also obviously China has to go to zero. Everybody has to and that is why pretty much everybody has signed the Paris Climate Agreement promising to go to zero.