The postwar era is commonly described as the age of oil. current era is the age of energy efficiency. Since 1973, the world has saved far more energy through improved efficiency than it has gained from all new sources. The energy savings of the industrial market economies alone exceed the combined energy use of Africa, Latin America, and South Asia.

The postwar era is commonly described as the age of oil. current era is the age of energy efficiency. Since 1973, the world has saved far more energy through improved efficiency than it has gained from all new sources. The energy savings of the industrial market economies alone exceed the combined energy use of Africa, Latin America, and South Asia.