Electric cars are only as clean as the electric grid they run off of, and in Singapore, that means one owner?s Tesla Model S is getting fined for producing too much CO2. Here?s how they came to this figure for what is ostensibly a zero-emissions vehicle.

The fine comes from Singapore?s Land Transport Authority, or LTA, which gives fines or rebates depending on how much (or how little) pollution a car emits. According to the LTA?s calculations, the Tesla Model S produces the equivalent of 222g/km of CO2, which is enough to categorize it as a serious polluter.