https://www.reuters.com/business/energy/biden-budget-target-us-fossil-fuel-subsidies-2023-03-09/ https://www.reuters.com/business/energy/biden-budget-target-...

https://www.reuters.com/business/energy/biden-budget-target-us-fossil-fuel-subsidies-2023-03-09/ https://www.reuters.com/business/energy/biden-budget-target-... Explains why it is difficult to pin down exactly but offers concrete examples too.