I am growing increasingly skeptical about biofuels as a solution.  In addition to the issues you bring up, it appears that there are serious environmental impacts due to soil depletion and possible nutrient removal (especially if we try to use the leftover biomass so as to preserve the edible portions of the plant), as well as the incentive for deforestation.  And there is the EROEI issue.

Other than massive nuclear and wind and solar, I don't see what the energy source is going to be once oil goes into serious decline, and that does not address the transportation fuel issue unless we replace our transportation infrastructure.  And we have not started yet.  Using less energy is the only solution.  If we have 20 years, maybe we can do it, but if the top of that curve keeps tipping over....

But don't worry, because I heard on the radio this morning that the Saudis have been pumping like mad, and have produced so much oil that they expect to throttle back early next year, and the gas prices will go down further (back up to $2.29 this morning), and the economy will take off.  But there's no need to worry about inflation in spite of all the jobs that will be created. The FCC really needs to work on blocking those broadcasts from other dimensions....

Twilight,

I'm with you on biofuels.  Love the concept.  Just can't get the numbers to add.  It's a last resort idea and requires huge reduction in total fuel consumption.

Twilight:  Agreed, but then there is another problem with bio-diesel. Currently an average to excellent soybean yield is about 50 bushels/acre. At $6.00 a bushel that is a $300 annual/acre crop, However at best it will yield about 75 gallons of oil and 60 gallons of bio-diesel. That means with zero capitol and processing expense, the bio-diesel has a crop cost alone of $5.00 per gallon.
I understand that Minnesota has enacted a 2% bio-diesel law that requires nearly all diesel fuel to be blended with 2% bio-diesel. Now I don't know how much nearly is, but here is a web-site to explain it further.
http://www.mda.state.mn.us/biodiesel/b2/default.htm
Here is a web-site of oil yield for oil-bearing crops.
http://journeytoforever.org/biodiesel_yield.html#ascend
Just thought I'd note this development for the group:

Vermont Gets Hydrogen Car Grant
Vermont will take part in a federally-funded project to demonstrate the practicality of hydrogen-powered cars.

The technology is expensive, but Vermonters involved in the project say there's good reason to move ahead with it.

"There's a lot of science behind this," Rep. Bernie Sanders, I-Vermont, told reporters at a press conference where he brought representatives of non-profit groups and entrepreneurs involved in the project.

Sanders announced a nearly one-million dollar grant from the Dept. of Energy for one of several demonstration projects around the country aimed at moving the nation off fossil fuels. Already, the first hydrogen fueling station in New England is under construction near the Burlington Electric Department headquarters on Pine St. It will take power from a nearby B.E.D.-owned wind turbine, taking the hydrogen out of water and using the gas to power a car.

So we're moving from the theoretical to the practical, at least as a demonstration. Here's the rest.

Don't use the words "practical" and "hydrogen" in the same sentence until you have calculated the energy throughput.

You get about twice as much energy from wind to wheels using batteries compared to using hydrogen.

OK but I did say as a "demonstration."

If what you say is true, then we are heading down a dead end. Why are smart people throwing time and money away on hydrogen if batteries are the answer? Is it that they just don't know? Do you have a link to a source that proves what you say? I'd like to know because then I'll pass it along to the folks downtown who are building this project.

Why are smart people throwing time and money away on hydrogen if batteries are the answer? Is it that they just don't know?
It's because hydrogen is relatively good for carrying energy from fossil fuels, and the fossil-fuel interests have made certain that the research money favors their products.  The people who want to do development have to go where the money is.
Do you have a link to a source that proves what you say?
There are dozens (the calculations are simple), but you might want to start with Future  Pundit's roundup before you take my word for it.
Great web site you have there, thanks. Very thorough. Something else for me to spend hours poring over instead of working, which is what I should be doing.

I try to retain some sense of optimism about all of this, that either by building an abundance of new nuclear power plants we'll be able to have enough electricity AND stay warm; that Stirling engine solar farms will deliver the solar promise without the drawbacks of traditional PV; that hydrogen will replace kerosene to keep our air fleet flying; that electric cars will keep us all in motion... but when you think of the folly, the stupidity, the blindness, the corruption, the deceit and the wishful thinking that is going on everywhere, I can't help but think, We Are So Totally Screwed. Anyway, it's Christmas Eve, so Merry Christmas and Happy Holidays to you. I've got to get into my Jeep and go to the bank 15 miles from here to deposit a check so I can buy some plastic crap for the neighbors' children while looking at Christmas lights which I used to enjoy which I now know are using up coal that we're all going to need in the future and wondering all the while just how much my house is going to drop in value when fuel becomes so expensive that people abandon the countryside and flock to the cities to stay warm and earn a living under futuristic Dickensian conditions from which we'll never escape. Merry Christmas!

I am growing increasingly skeptical about biofuels as a solution.
And rightly so, but check out my calculations here and tell me if I've got something wrong.