The sensible thing to do when the science that says that we need to stop producing CO2 as quickly as possible is clear but the solution space is not figured out quite so well is to set up a cap-and-trade system for emissions and adjust the cap to whatever the climate scientists think is reasonable for the warming goal we're trying to achieve. This has been known for a long time among economists; there even was a Nobel price for this.

There are also many steps that we can take right now that are completely uncontroversial. For example requiring proper insulation for all new buildings and starting a program to retrofit existing buildings.