Danielle Vitoff, director of decarbonization solutions for consulting firm Guidehouse, said that details are still emerging on how power providers will confront, or even consistently measure, emissions that extend up the supply chain or down to the customer level. Cutting Scope 3 emissions on the customer end, she said, requires a "much more holistic view of energy system decarbonization as a whole," not just replacing fossil fuel generation with renewables.