Deals with the necessity of energy conservation in developing countries as they become industralized and their populations grow - the need for increasing amounts of energy places a heavy burden on energy-supply systems.

Emphasizes the possibilities of using renewable sources of energy instead of conventional fuels to heat buildings in the cool season and to heat them in the hot season through the proper design and construction of buildings.

Particularly in rural areas, the difficulty of providing energy for human settlements is becoming one of the greatest constraints on the improvement of living conditions.