I was addressing the first part of his comment, where he discusses Migeru's suggestion about Dimethyl Ether, which can be used in mass transports, too.

I certainly agree about (electric) buses, trams and trains being the rational solution. I think a society based on individual ownership of a car is definitely unsustainable. Actually, I chose not to own a car and I use public transports instead.

"Ce qui vient au monde pour ne rien troubler ne mérite ni égards ni patience." René Char