The Information Age will increase our use of oil. For one thing, information technology functions like an economic lubricant. Economic growth, especially in developing nations, means more energy use, if for no other reason than people will buy cars as soon as they can afford them. Then too there is the universal lock-step relationship between economic growth and electric use, which drives a global appetite for conventionally fueled power plants. Airplanes and ships will remain oil-powered for a long time.
Oil is the alternative fuel.
The search for alternative transportation fuels is an environmentalist crusade. But not because we are facing an oil shortage. Nor because we are impairing air quality. On the contrary, new cars are remarkably clean. The exhaust of some new cars is actually cleaner than the air in many cities.