ABSTRACT
E nergy is not scarce. There is enough coal in the world to meet any plausible energy demand projections for centuries to come. 1 If coal is unacceptable, the global society may resort to the plentiful supplies of solar energy. The solar influx to the earth carries some 10,000 times more energy per year than the current annual global anthropogenic use of fossil fuels, nuclear power, and hydroelectric power combined (WEA 2000, 167). Solar energy can be converted into clean energy carriers, such as electricity and hydrogen, and make our energy and transportation systems virtually emissions free.
