Originally Posted by sequoias
They're working on hydrogen cars in mass production scale in near future, I think. The biodiesel/vegetable oil powered diesel is getting popular now....it's cleaner than regular diesel fuel and vegetable oil is cheaper because u use vegetable oil waste from the fast food restaurants and you need a convertion equipment installed in a diesel powered car and it will run vegetable oil no problem.
I like the vegetable oil solution best. That solves two problems at once.