From my perspective, "the same rules" would mean having the same legal/financial consequences for each gram of CO2 emitted. In which case people who don't driv

From my perspective, "the same rules" would mean having the same legal/financial consequences for each gram of CO2 emitted. In which case people who don't drive a car much wouldn't be punished as if they do, regardless of wealth or other factors. It's like the classic question about which is heavier, a pound of lead or a pound of feathers? Is it impossible to agree that a kilo of CO2 is the same whether it's emitted by a Prius or an SUV or a Ferrari?