A Plan to Power 100 Percent of the Planet with Renewables

[LakeLeaf]

The price of nonrenewable fuel absolutely must increase to push the market away from it. We can either wait until we run out (and incur the environmental and economic costs of that) or start pushing with tax policy and similar schemes to inflate the cost artificially.
=Smidge=

I'd predict that as electric cars start to make a significant market impact, the price of gas will decrease to compete. Right now, gasoline is pretty much without competition, so the only market force to keep the price down is competition among different oil producers - and that's somewhat a stretch. Throw in a decent fraction of all cars sold being electric and I'll bet you see gas prices plummet.

Not exactly what you're looking for.