The problems I see are as follows (in order):
1. Pollution, specifically coal: Somewhere around a quarter of our energy usage is in the form of coal - virtually all of that is used to generate electricity. Oil is also a major source of pollution, though its uses (and pollution production) are more diverse. I don't consider nuclear power to be a major (or even minor) source of pollution.
2. Capacity (vs demand): Demand is rising faster than supply and results in increasing costs and more frequent (and more massive) power outages.
3. Foreign dependence: Reducing our emphasis on foreign oil would improve the global political situation somewhat, but more important is reducing our trade deficit.
4. Cost: Obviously solutions cost money, but in the long term, a good solution could reduce energy costs.
My solution is a 30 year, multi-pronged, and three-phased approach:
Phase 1 is short term: 10 years. It will focus on short-term needs and heavily fund research for long-term solutions. It will include:
-Construction of many large, modern nuclear power plants. Five years or so of design and preparation should enable starting construction of 10 a year, taking 5 years to complete, for the indefinite future. By the end of phase 2, it would mean replacement of all existing nuke plants and an overall doubling of capacity from nuclear power. Increases in capacity would start at the end of the 10 year phase 1. This is a major expense: tens of billions of dollars per year.
-Fund alternate energy research heavily. Emphasize things considered viable, but spread money around enough to pick up some speculative research. Fusion and solar power are key. Fund hydrogen fuel cells too, but I'm more concerned with generation than storage. Fund improved fission technologies. Total funding for research would be on the order of ten billion dollars per year.
-Immediately impose heavy regulations to reduce the largest sources of pollution immediately (no 10 year phase-in crap). This means, primarily, coal power plants. Technology exists to greatly reduce their pollution with little difficulty (just money) - require its immediate implimentation. Close other loopholes - trucks and ships aren't as well regulated as cars, for example. This cost would largely be absorbed by the economy, but it would be several tens of billions of dollars.
-Subsidize personal alternate energy, ie solar panels on houses/businesses.
-Reward conservation, ie. give tax incentives for conservation: buying compact fluorescent lights, heat recovery, energy efficient heat/ac, etc.
Phase 2, 10 years, decision-making, development, expansion of Phase 1 solutions. After 10 years of heavy research, we should know where we stand on new technologies. Start implimenting what works, continue research on what is promising, and drop what is not.
-If fusion becomes viable, start planning for massive (and I mean massive) implimentation. This would cost tens of billions of dollars a year.
-Expand Phase 1 nuclear plant construction (unless a viable alternate is found) and include new technology. This would cost tens of billions of dollars a year.
-Start de-comissioning coal plants as new nuke plants come online unless significant (and I mean in excess of 99%) reductions in emissions are doable.
-Start implimenting solar solutions: that means ramping up production of 20% efficient solar cells on the order of hundreds of square miles per year (or space-based collectors). This would cost tens of billions of dollars a year.
-Start implimenting secondary energy solutions, ie hydrogen fuel cells. Emphasize production and distribution. This would cost tens of billions of dollars a year.
-Upgrade electric grid to handle upcoming new load and distribution. This would cost tens of billions of dollars a year.
Phase 3: Long term solutions
-Continue nuclear program - fission or fusion:
-If fusion is available, build 10-20 plants, hundreds of terawatts each, and have them take over the vast majority (>90%) of the grid, including expanded capacity for hydrogen generation. This could easily cost a trillion dollars over 10 years.
-If fusion is not available, construct large solar arrays to augment fission capacity. 30-50% of total capacity should be solar. This could also easily cost a trillion dollars over 10 years.
-Close the rest of the coal plants.
-Begin phase-out of gas powered cars.
In my estimation, in 30 years we could transform the way we produce energy in the US. But it wouldn't be cheap: easily $100 billion a year or $3 trillion over the 30 year life of the project. Roughly 1% of our current gdp. Of course, much of this money is recirculated, so its not as simple (or bad) as just sucking it out of the economy.
The benefit after 30 years, would be vastly reduced pollution, vastly increased capacity, assured long term availability/renewability, and lower energy costs going forward.