Interestingly enough it probably cant anymore unless your car is old. One day I had a short discussion w theBuddah, the thread we were in had something to do w suicide I think. Anyway so killing yourself w a car exhaust came up. Turns out that modern cars scrub CO2 so well it's difficult to actually kill yourself w exhaust. Of course there are still many old cars around, but this threat us much lessened these days.