Your right! I was just looking at it from the point of view of how efficient does this standard require power plants to be, since 270g of CO2 to run a 1kw heate

Your right! I was just looking at it from the point of view of how efficient does this standard require power plants to be, since 270g of CO2 to run a 1kw heater for an hour seemed high. If you look at the whole energy supply chain though the picture is probably a lot worse for both, in particular when you account for things like methane leaks or the emissions from transporting + refining oil.