I could understand a law requiring tighter insulated houses or thankless water heaters if energy is so much a concern.
But even that is a nonsense. Even when the housing thermal management count for one of the highest energy consumption items per capita, directly enforcing the way how people use it is a nonsense. E.g. investing into seasonal house, when the use season is short does not save anything, just because most of the time the building is left with the heating/cooling OFF.
The other major "energy consumer" is the transportation, in most places it is the major one.
If the consequences of energy production is a concern, you have to first save the energy on places, where it is consumed the most and the upgrades are not terribly expensive. How to judge that? Quite easy method: Move some taxes on the energy and the desire to save money will make sure, the most optimum upgrades will be made by the users/owners.
The taxing may differenciate according to the thread level (environment damage, national energy security interests,...) it pose.
And that will force the production technologies to better technologies, when they will be really ready.