Few energy-efficiency regulations
Energy-efficiency for hydrocarbon burned for production cycle and for output devices could go further for cars (i.e., MPG) or for light bulbs (i.e., lumens per watt).
Emission-efficiency regulations also target oil and coal industries themselves, as they represents about 10% of GHG emissions (e.g., extraction energy, methane leaks, gas for distribution by trucks…).
Nations have been pushing for quality standards to lower CO2 emissions. In the US, these standards are contested in the court system, as many find these regulations far too costly. In the EU, regulations are going further.