There is a good reason not to build more nuclear plants. The first being that we need chemically stored energy, not electrical energy. In fact, if we built more nuclear plants, the market would be flooded by the new source, lowering the cost of electricity itself, making the nuclear energy more expensive to generate than the income it would create. It's all about keeping supplies only 3-5% higher than demand.
We need oil, and there is no substitute that can be used in the necessary catalytic reactions it's used for, as in plastic and pesticide production. The biggest problem with oil is that it's necessary for our mass food production techniques and its transportation. Wastefulness like creating little trinkets to sell at Wal-mart is jeopordizing availability of oil to be used for necessary production. When cars were first built people ran them on alcohol and cooking oil, depending on whether it was a dieseling engine or a spark ignition engine. We switched to oil to create gasoline and diesel fuel because the use of food crops for fuel was driving up the prices of food. Cheap food keeps human production levels high. As fuel starts to become more expensive, we can't just switch over back to alcohol and cooking oil, and our mass transit that is essential to the western world will no longer be viable. This is going to be a major nation shaping phenomenon that will create problems far beyond an expensive commute, and the effects on our economy will be catastrophic. There is no real solution either, so we're going to have to just ride it out and fight over the resources and land necessary to sustain without it. Someones going to get the shaft, so it's going to get ugly.