I stumbled across a web site that talks to Peak Oil.
I found this particular post interesting. It talks about supply and demand and suggests we are in for a number of ups and down in the price of crude oil and thus of gasoline.
There is a chart in the comments, just a couple down, talking about the price of whale bone and whale bone "production." This had to do mainly with corsets, which generally went away a hundred years ago.
In a way this problem of supply and demand and the resulting price talks to the question of a gas tax, which was discussed yesterday by Lynne at Left in Lowell. A tax on a product which has a fluctuating demand, based upon price, is not a steady revenue stream for the Government. (I left a comment there this AM (after comment 6) but my comment has yet to show up.)
Regards -- Cliff