US has $40T federal debt (+state, +municipal, +household) and probably 100T+ debt worldwide which the future generations have to pay.
Fossil fuel is unsustainable without substantial subsidies from Govts. Global Fossil Fuel Subsidies Reached $7 Trillion in 2022, an All-Time High: https://e360.yale.edu/digest/fossil-fuel-subsidies-2022
More than a century of subsidies and yet not profitable on its own.