The thing that would change this would be clear, certain, imminent and obvious impact to local welfare, combined with trustworthy assurances that the desired ac

The thing that would change this would be clear, certain, imminent and obvious impact to local welfare, combined with trustworthy assurances that the desired actions will change that. If we look at e.g. the IPCC reports, then we see statements which effectively say "there will be a much higher probability of various bad events in the far future, most of them somewhere else, that are likely to have various unspecified very bad consequences to people in general, most of them in other communities; and by the way the changes are already irreversible", which fails all those criteria. People will not be willing to make sacrifices as long as it's not clear (from sources you trust - experts may not suffice, as covid shows) what exact very harmful near-term consequences you and your community will face; how exactly the proposed sacrifice will change that; and how the coordination problem will be solved so that other large countries including those on the other side of the world also take that sacrifice, which is a key part of showing that the sacrifice will have an effect.