Originally Posted by
Nouia
Oil shale extraction becomes profitable at around $95/barrel, and fortunately enough 3 trillion barrels worth of it (60% of world supply) is buried under Colorado.
I heard the canucks have lots of that, too.
To metricoclock: as far as I know, tyre thread and sidewalls could be made of 100% natural rubber. Yes, bicycle tyres would be more expensive, too, but compared to cars, bikes seem stil cheaper. Cars have most all the disposable types of parts as bikes + gas consumption.