You looking at energy supplies in terms of their use today...but there has also been a constant increase of efficiency in technogies of various types with reduction of energy needed to power them.
My key point is to the discussion as to how to maintain national vitality and viability should foreign energy supplies suddenly be lost to us....not just to survive but to thrive!
OK, let's look at this question and talk about how to solve it. We can, you know. Let's look at it from the perspective of what we know how to do and what we can do.
What we know how to do and what we can do are two things. First, we can generate copious amounts of clean, economical, emissions-free electricity from nuclear generators. I'm talking current LWR technology, advanced LWR technology, full actinide recycle, fuel reprocessing to capture energy that would otherwise be dumped, breeder reactor technology, a closed fuel cycle as can be accomplished with a system like the Integral Fast Reactor, cogeneration to capture "waste" heat from steam electric plants, the whole smash. That opens the door to things like electric substitution in the transport sector, conventional electric trains, maglev trains, fuel cells, the hydrogen economy, basically everything that can be powered with electricity being so. That means time and effort and cost, but it gets us away from the foreign energy trap.
The second thing we can do is mine coal. Lots of it. Coal when burned as it is can be dirty, but if we have a robust electricity supply, we can use some of that in a massive synfuels program. Making diesel from coal and going with more diesel-powered vehicles can go a long ways towards reducing petroleum imports. Coal-synfuels byproducts can also be used in the petrochemical sector.
I know a lot of people on FR want us to exploit more fully our domestic petroleum resources, but I have to tell you, compared to what foreign reserves there are, ours are pretty minor. Sure, we should use, wisely, what we have, but I'm thinking those materials are quite valuable as feedstock for non-fuel petrochemical industries. I'd rather save them for that. Same with natural gas. Stop burning it in power plants and save it for better-matched end uses, like home heating.
What will it take to get us to this goal? Well, first, it will be to raise up a generation of political leaders who are not afraid to see it like it is and tell it like it is, and tell the business-as-usual, seven-copies-of-enviromental-impact-statement, a$$-kissing bureaucrats to stuff it where the sun don't shine. Likewise the special-interest groups and intervenors and obstructionist environmental wackos. It will take a willingness on the part of the public to spend money in government-private industry partnerships to make this kind of thing happen, exactly what we did in the Manhattan Project and the Apollo Program. And it will take a generation of business leaders who will have a vision for the future that goes beyond quarterly profit statements and bonuses for CEOs and another penny on the dividend line for shareholders, companies that aren't afraid to take some risks and put the national welfare ahead of corporatism. Finally, it will take ordinary people to wake up from their American Idol and Dancing With The Stars-induced torpor and get educated and understand what is at stake here. If we get that kind of Average Joe, we just might hack it, if the other side gives us time.