There are only two routes to preventing the climate disaster we've already set in motion:

Risky geoengineering projects like stratospheric aerosol injection.

Direct atmospheric capture of CO2.

The latter is the safer option because it's just restoring the atmosphere to a known good state. Direct atmospheric capture of billions of tons of CO2 per year will take enormous amounts of energy. We're going to need a lot more nuclear power plants if there's any hope of pulling this off.

Alternative is World War Three when large parts of the planet become uninhabitable.