OK let's get this settled....

Diesel (even the cleanest with the exception of the veggie oil type) is WAY DIRTIER and MORE CARCINOGENIC than gasoline exhaust.

It's NOT a trade off. California would not have a ban on the registration of diesel vehicles if Diesel was cleaner - they would have a ban on GAS engine registrations.

Diesel is definitely dirtier and is NOT a long term answer or even a better solution.....it's just not.

Surely even a fan of diesel engines can see the truth in this statement?