"The truth is that no combination of alternative fuels or systems for using them will allow us to continue running America, or even a substantial fraction of it, the way we have been. We are not going to run Wal-Mart, Walt Disney World, Monsanto, and the Interstate Highway System on any combination of solar or wind energy, hydrogen, ethanol, tar sands, oil shale, methane hydrates, nuclear power, thermal depolymerization, "zero-point" energy, or anything else you can name. We will desperately use many of these things in many ways, but we are likely to be disappointed in what they can actually do for us.

...for example, commercial airplanes are either going to run on cheap liquid hydrocarbon fuels or we're not going to have commercial aviation as we have known it. No other energy source is concentrated enough by weight, affordable enough by volume, and abundant enough in supply to do the necessary work to overcome gravity in a loaded airplane, repeated thousands of times each day by airlines around the world. No other way of delivering that energy source besides refined liquid hydrocarbons will allow that commercial system to operate at the scale we are accustomed to. The only reason this system exists is that until now such fuels have been cheap and abundant. We are not going to replace the existing worldwide fleet of airplanes either, and besides, there is no other type of airplane we have yet devised that can work differently.

If you really want to understand the U.S. public's penchant for wishful thinking, consider this: We invested most of our late twentieth-century wealth in a living arrangement with no future. American suburbia represents the greatest misallocation of resources in the history of the world. The far-flung housing subdivisions, commercial highway strips, big-box stores, and all the other furnishings and accessories of extreme car dependence will function poorly, if at all, in an oil-scarce future. Period. This dilemma now entails a powerful psychology of previous investment, which is prompting us to defend our misinvestments desperately, or, at least, preventing us from letting go of our assumptions about their future value. Compounding the disaster is the unfortunate fact that the manic construction of ever more futureless suburbs (a.k.a. the "housing bubble") has insidiously replaced manufacturing as the basis of our economy.

The most arrant case of collective cluelessness now on view is our failure to even begin a public discussion about fixing the U.S. passenger railroad system, which has become so decrepit that the Bulgarians would be ashamed of it. It's the one thing we could do right away that would have a substantial impact on our oil use. The infrastructure is still out there, rusting in the rain, waiting to be fixed. The restoration of it would employ hundreds of thousands of Americans at all levels of meaningful work. The fact that we are hardly even talking about it—at any point along the political spectrum, left, right, or center—shows how fundamentally un-serious we are.

...the agenda for facing our problems squarely can, in fact, be described with some precision. We have to make other arrangements for the basic activities of everyday life."

-the rest here.