at least alleviate it.
Some spend time predicting disaster and inevitable drastic changes in our way of life do to the inadequacy of the fossil fuel supply. In my opinion, the situation is dire (re Global Warming). But I do not think we have the option to do nothing except wring our hands and wail. I think there are things that can be done. YEs, they may not avert disaster, but I would rather try and perhaps avoid the dire consequences of doing nothing at all.
As to the reduction of dependency on fossil fuels, and the attendant issues of Global Warming, renewables will provide some relief. Predictions vary, but most experts are expecting Fuel Cell cars to be practical in 20 to 30 years. Fuel Cell cars should eliminate the use of oil for cars (heavy applications like trucks, not so - leave that to ehtanol and bio-diesel). But rather than wait till Fuel Cell cars are developed we need to act now.
The Oak Ridge National Laboratory has predicted that ethanol can meet 30% of the gasoline demand (I don't know if energy crops such as switchgrass were included in this estimate). Switchgrass is several times as productive as corn for ethanol, requires little to no fertilizer and virtually no pesticides, and it grows on land which is marginal (at best) for food agriculture (this means new additional area will be added to that producing ethanol crops). Also, I doubt that this estimate took into account that FFVs can be designed to take advantage of the higher octane of ethanol (
SAAB 9-5 Bio-Power gets just as good as mileage on ethanol85 as when it is using gasoline) by using compouter controlled
turbo, or super-charging. This would increase the 30% figure a bit(possibly to as much as 37% - if ORNL estimate just used the energy equivalence of ethanol to gasoline without considering the possibility of optimising engine design for the higher octane of ethanol). Hybrid vehicles, though expensive will continue to be developed and prices will come down in time. Combining hybrid technology with ethanol we could see a 50 - 60% reduction in demand for gasoline (no, this is NOT 100%, but it's better than doing NOTHING). Bio-diesel will further reduce demand for oil for transportaion and heating and some industrial processes - how much I do not know. But the total reduction of all above could be 70-75%. That's not perfect but it is significant.
By the way, the crops that are grown for ethanol, while they are growing they are taking Carbon Dioside OUT of the atmosphere. This is something no fossil fuel can do (well, it did it, but it was millions of years ago).
Now on the subject of oil supply shortages due to human (terrorist activities) or natural disasters (another hurrican season like 2005) we can expect to get a supply shortage in the next 3 to 5 yrs . What the odds are nobody knows but realistically, I think it's probably from 50% to a 100% chance. That is why we need to double production of ethanol as quickly as possible - to provide some protection from a disruption of supply of say 5 - 8%. Without some protection against this we will experience a serious recesssion which will put many out of work and not help out our economy. Ethanol, which we are currently producing, provides the most economical and quickest way to provide this short term protection against supply disruption.
Beyond that we should be aggressively developing cellulosic ethanol (practical within 5 yrs), bio-diesel (practical right now) and even hybrid technology (I only hope we have thoroughly thought out the environmental ramifications of the production and disposal of those batteries). Also, aggressive promotion of increased efficiency of all vehicles and powered appliances shouldn't be neglected.
We may not be able to replace all the oil but we should certainly try to reduce our use of it for national security reasons, economic reasons as well as of course, Global Warming.
I don't think doing nothing is an option we can afford.
A note on the SAAB 9-5 Bio-Power FFV:
BioPower models make up a staggering 60% of all sales of the Saab 9-5 range in Sweden. 400 cars alone have already been bought by the car rental giant Avis, and Hans Larsson, Director of Procurement at Avis Sweden, was enthusiastic about their purchase:
“The flexibility of the Saab 9-5 BioPower also makes it far more practical to use when compared to some hybrid and CNG-powered cars we have tried."
OH, if only the American car manufacturers would make their FFVs like Saab does (SAAB is owned by GM!). Then anybody buying a FFV (at no extra cost over a regular car) could get just as good as mileage on ethanol 85 as when they were using gasoline. But when using Ethanol 85 they would be reducing GHGs by 85%!! But that would mean getting serious about reducing GHGs and reducing dependence on imported fossil fuel. ...And who wants that, certainly not Dick "Quick Draw" Cheney.