If we nuked the atmosphere we could create nuclear winter and cause Global cooling
Sure, but the most of the ideas people would be happy about involve keeping the bulk of the human population alive, along with the rest of the ecosystem.
And most people want a utopia, at a certain point however we have to acknowledge the billions guaranteed to die from the status quo aren't destined better or quicker deaths than those killed by whatever solution we choose now.
Starting a nuclear war is still likely far worse than even status quo.
I think you could nuke the atmosphere without a nuclear war, you’d just need a UN Climate Action resolution
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.