How much do motorcycles contribute to global warming?
How much do motorcycles contribute to global warming?
But riding on two wheels may not be any more environmentally responsible than riding on four. Turns out the average motorcycle is 10 times more polluting per mile than a passenger car, light truck or SUV. It seems counter-intuitive, because motorcycles are about twice as fuel-efficient as cars and emit a lot less C02. Jun 10, 2008