As the world copes with rising costs of conventional energy-producing commodities such as oil and gas, alternative energy technologies are becoming increasingly viable. These include solar, wind, geothermal, and biofuels. As transportation and efficiency considerations also become critical, traditional delivery mechanisms for energy are also being rethought. Electricity is gaining momentum as a method of delivery as electric automobiles and trains gain popularity. Storage of energy is also becoming critical as energy users move more into alternative fuels. The industry thus is experiencing unprecedented and massive changes in all aspects of energy production, transmission, delivery, and storage.