All of this is already happening. In the EU energy efficiency labels are being put on household appliances and cars. Clothes dryers have them, vacuums have them

All of this is already happening. In the EU energy efficiency labels are being put on household appliances and cars. Clothes dryers have them, vacuums have them, washing machines and dishwashers, too. It's not allowed to sell things that waste more energy than it's currently technologically necessary (within reason). https://en.m.wikipedia.org/wiki/European_Union_energy_label https://en.m.wikipedia.org/wiki/European_Union_energy_label