The market does find its own, but it must do so in the context of government regulations. Our government currently says that you can't exploit new sources of domestic energy, nor can you put up any new refineries or nuclear power plants. The market is acting appropriately - prices are rising due to the severe restrictions on supply.
So the market is already doing its job. The issue that needs to be resolved is the government action that limits what the market can do. You cannot get this from a "global warming" candidate.
the market is not going to move away from oil on its own, even if you allowed nuclear plants.
The reason why everyone is talking about alternative energy today and not the gas guzzling SUV’s of the 90’s is because the price of oil is much much higher.