The present one is not enough to kick it out completely.

150$ dollars would make groceris double price.. it will get to make a dent on wages and we would think all the sky falls over our heads
90-120 seems a comfortable band whcih cna be achieved win a couple of years ina smoothly way. We would get rid of the big cars and introdcue hybrids to compensate the high price. Good enough for a wake-up call and good enough to make gas more expensive comapre with nuclear and wind...but not high enough to scare th ehell out of everybody.

Wild guess.

A pleasure

I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude