in my views:
1) Motorcycle engines na 2 stroke are bad... in terms of air pollution than 4 stroke... but they are definitely polluting less (being single pistons) than car engines that are 6 cylinder.
2) yes motorcycle engine can operate a/c unit BUT with limits... RPM of engine and torque of the engine.... I think mahihirapan ang small displacement motorcycle engines to run an a/c lalo na kung single cylinder lang ito and it is running a cargo load at the same time. Yun ngang 3K na makina ng toyota which is 1200cc hirap pagmeron aircon yung oto.... (pero mabigat din kasi yung load ng toyota na car).
3) your risk of being run over by a bigger vehicle with a stupid driver remains the same when you are riding a motorcycle or a bike in the streets... the key is not to make the car TOO small (like a go-kart) and use all necessary safety precautions (like brightly colored, signal ligts, light reflectors, headlights etc).





