As I mentioned in another comment in this, 2-strokes don't need to produce horrible amounts of emissions, you just need to mix the proper amount of oil in with

As I mentioned in another comment in this, 2-strokes don't need to produce horrible amounts of emissions, you just need to mix the proper amount of oil in with the gas for the given engine load. This can be done (and is done!) today with injected 2-stroke motorcycles. The emissions go down dramatically and you can get as much or even more power than a traditional pre-mix 2-stroke.