Strategies for energy use.

Nuclear power, solar cells, wind, and tide will all have roles in supplying energy for growth and development without aggravating the greenhouse effect. Yet exotic new energy sources alone cannot meet the challenge. Significant improvement in the efficiency of energy use is the real hope. Energy efficiency can reconcile environmental concerns with economic development for all nations. It can stretch energy supplies, slow climatic changes, and buy time to develop alternative energy resources. After a review of conventional fuel consumption, the paper discusses the opportunities available for energy efficiency in automobiles, houses, refrigerators, gas furnaces, and air conditioning.