^^^^

This is why we shouldn’t REQUIRE specific energy efficiency numbers. Just tax the living chit out of “dirty” forms of energy production so that people will either want to:
(1) Increase their efficiency and reduce use or …
(2) Elect to buy from clean providers (i.e. own solar system, renewable energy firms, nuclear energy).

Use tax policy at the energy-production or sale end to shape consumption. (Extreme poors would get a credit to offset add’l taxes at the low end.)