As I understand it, fuel economy regulations in both the US and EU allow larger cars to burn more fuel before there's a penalty or a need for the car maker to b

As I understand it, fuel economy regulations in both the US and EU allow larger cars to burn more fuel before there's a penalty or a need for the car maker to buy offsets from a company that sells more efficient cars[0]. I'm inclined to think that's a bad idea since it incentivizes the production and purchase of larger, less fuel-efficient cars, and could probably be fixed by simply treating all passenger cars and light trucks the same. [0] https://news.ycombinator.com/item?id=31218747 https://news.ycombinator.com/item?id=31218747