This rings similar to things I read about food trucks. They run inefficient gas electrical generators. A single one running for a day can display dozens of cars

This rings similar to things I read about food trucks. They run inefficient gas electrical generators. A single one running for a day can display dozens of cars switching to hybrids. Point is these small things are huge perpetrators of pollution that we forget when we regulate the car industry. Pollution is not a single solution problem, everything must be accounted for.