I recently learned about the idea of the "global carbon reward", which is an idea to create a monetary (meaning not fiscal) incentive to reduce or capture carbon emissions. Kind of like a gold backed currency is based on gold mined from the ground but based in carbon "mined" from the air. And through the monetary route it doesn't create any direct expenditure or debt on govt balance sheets, a bit like quantitative easing that is happening anyway.

There is a summary video here: https://youtu.be/Kmd2TSHsdoM