- Beef up our electric grid to make it less prone to being knocked out by overloads, electromagnetic pulse, bad weather, falling trees, and critters like squirrels chewing;
- Get some of our gas and oil firms busy drilling and fracturing enhanced geothermal systems which are often a better buy than natural gas for electric power;
- Encourage energy storage from wee hours of morning when little energy is used until noon to rush hour (4-8 pm);
- Add lots of wind and solar power plus more storage, both to finish replacing fossil fuel for electricity and to prepare for electrification of both most transportation and most HVAC - with heat pumps to both cool in summer and heat in winter.
Take a look at Tom Rand, "Kick the Fossil Fuel Habit: Ten Clean Technologies to Save Our World" - a book available in the public library. The 2010 edition has pretty near the same content as the 2007 edition but it's been updated some and reformatted a bit. It still seems that by investing $1 trillion for a new smart electric grid plus about $6 trillion for renewable energy electricity (=s $7 trillion total) we can replace the 1/3 of our energy that we already utilize as electric power with all renewable energy.
That means it's possible we could have enough electric power for everything we do for $21 trillion. Electric cars are somewhat simpler and much more efficient; they will soon be cheaper, over their ten-year expected service life, than ICE cars. We already have electric trains over heavily traveled routes. It's not really a giant leap to replacing domestic air travel with high speed electric trains.
Maybe we can invest in ground loop heat pump HVAC for all new construction and some retrofits, which will result in cutting down to about 10% of our current use of fossil fuels over the next twenty to thirty years!
It's all doable. What it takes is - doing it.