With new technological advances and mass production, projected cost declines should make wind power one of the world's cheapest ways to produce electricity.
Diabetes monitors and pacemakers have improved dramatically in the past 20 years and have fallen in price-but costs have gone up because they are now being used by more patients.
Revenues from tourism and Cuba's main commodity exports have fallen dramatically, and residents report shortages of fruit and vegetables at markets across the capital.
In fact, in line with past experience, capital expenditure in the oil sector has dropped sharply in many producing countries, including the United States.