Who says that democracies are the solution? Personally, I envision a more authoritarian eco-communism.
Others might have other models in mind, but it's a cop-out to say "oh well, we've tried bourgeois democracy and it was inevitably corrupted by capitalist interest, I guess we're all out of ideas..."
> oh well, we've tried bourgeois democracy and it was inevitably corrupted by capitalist interest
This is not my point. I think most western democracies do exactly what voters want against climate change: Nothing that would cost extra.
Effective policies to curb CO2 emissions are numerous and pretty obvious: Get rid of combustion engines, phase out fossil fuels from electricity generation, scale up electric grid interconnectivity and storage, lower emissions in steel/concrete production.
Voters are mostly not against those policies, but as soon as there are visible costs (fuel/vehicle/construction/electricity costs rising) or minor inconvenience (vehicle range) any progress gets firmly stopped.
I don't see how another form of government would help in any way-- the eco-communists would just get toppled before they could get anything done.
Others might have other models in mind, but it's a cop-out to say "oh well, we've tried bourgeois democracy and it was inevitably corrupted by capitalist interest, I guess we're all out of ideas..."