I have a better idea - I have been very involved as a supplier to the class 8 market since 2001 - exhaust related.

My idea = diesel trucks. Remember the 2010 emissions? Word was when one was running, it was emitting cleaner air out the stacks than we normally breathe. I know engineers like to be innovative, & there is this curious urgency to "move forward" in today's era, but you know what? The wheel has already been invented.