It's not just them, governments are also a huge fucking problem on their own even without being puppet theaters for the rich.
Shocking revelation...
The biggest problem that we can realistically overcome is the lifestyle we have all been accustomed to, which is only going to get worse as global conflicts continue to ramp up. The pandemic was a hint, a minor preparation for it, and the results weren't thrilling. Trying to deal with the rich would be more plausible if the outcome, the destabilization of the society they've intertwined with, wasn't so certain.
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.