Realistically, in this new world (since Russia's invasion of Ukraine and China's coordination and complicity in it), there's zero reason for China or Russia or any of their allies to coordinate with the rest of the world to reduce greenhouse emissions, especially when their economies are so heavily dependent on greenhouse gas for their energy sources and GDP. Deglobalization is going ahead full-speed, and the forces based upon globalization were the only real way to rein in other countries' behaviors in a peaceful way.
So why should the US and EU cripple themselves? The world is in a state of war, and we need to start acting like it. Nuclear energy is a great solution that solves both climate change and energy demands, but it will take a long time for any country to get there.
