A more practical approach would be the electrification of transport. Switching half the truck and personal auto miles to electrified transport would require an increase in electric generation capacity of only 10 percent. Electrified transport is clean, non-polluting and energy-efficient. Light rail and rail systems are already in wide use. First- generation maglev systems are operating, and lower-cost second-generation systems are being developed.
(SIGH!)
The above is one pretty common belief that totally IGNORES the fact that while electrical power SEEMS a cheap and easy solution/alternative, it IGNORES the issue of WHERE that electricity comes from and HOW it is generated! What is the "gain" in using electrical power if it requires MORE oil related fuel to generate it at a distant location and then "transport" it to your local electrical outlet than it might if you simply burned that same fuel directly in your vehicle?
Electrical power is not "magic", doesn't generate itself, and DOES consume fuel or energy in one form or another - and transmission and distribution isn't cheap and easy either!
The notion that setups like locomotives are "electric", and thus cheap to operate, ignores the fact that their generation of electricity still consumes fuel - at the rate of gallons per FEET in some cases - their use of electric motors for actual drive power is largely related to the easier control of driving force due to lack of the need for massive transmissions and related drivetrain componenets rather than by great fuel savings - otherwise, the 18-wheel guys would be using them...
As to the "ease" of replacing fossil fuels with agriculture - I have often stated that few individuals actually comprehend the sheer VOLUME of fuels we consume daily or hourly - and the land needed to farm a significant replacement, as well as the fuel consumed to plant, cultuvate, harvest, process, and then distribute the finished fuel product...
Our problem is NOT so much a "fuel" problem - it's a POPULATION problem! How many of you in your local cities, towns and villages are seeing NO local growth - new homes and subdivisions being constructed?
Precious FEW!
As new homes, and people to fill them continue to increase, so will our need for fuel for their transportation and to power those homes - and so will the need to feed and clothe them - which in turn will require yet more agricultural lands for FOOD - what will we really want and need most - FOOD for our bodies, or fuel for our vehicles?
Reduce/control outrageous population growth, and MANY of our related problems and issue fade away and are greatly reduced...
It's not an easy answer, and one that few really want to face - but it IS the basic problem related to many of the issues we face increasingly as time goes by!