Of course it is very difficult to make a more or less precise assessment of the opportunity cost concerning the oil and hydrogen energy sources in financial terms and that is why such assessment is not used in economics. But why is opportunity cost issue is so important and why it is raised ultimately? To answer these questions it is necessary to understand that growing needs of our society can not be satisfied because of lack of resources. Modern technologies allow to produce energy by extracting oil from the deepest entrails and of course such production is more expensive. Despite of growing prices on energy the demand grows also and increased demand increases prices even more.

One day most people just could not afford using oil as a primary source of energy and it will result in economic crisis if another energy sources would not be mastered. For this reason scientists search new energy sources taking into consideration its price, availability and cleanness. Demand on one or another energy source depends on consumers? income, tastes, wealth, inflationary expectations and future expectations. It means that hydrogen will be purchased only by those people who can afford it, who like it (from the point of ecology, convenience, prevalence