Fuel cells have several advantages over conventional ways of producing power. A brief explanation of operating principles, structure, and economic considerations is presented. (PS)

A concept of transportation as purposeful activities and experiences of a manipulative nature is the real key in meeting the objectives of an industrial arts program based on technology. (GR)

Describes the discipline approach as a potential solution to the problem of developing content and method for industrial arts transportation technology. (GR)

A power technology program includes internal combustion engines, units in rocketry, electric motors, and future power sources. (GR)

The continuing controversey over offshore oil/gas has given impetus to searching for domestic energy alternatives. The need for and types of several alternative sources are discussed. Indicates that the United States needs to pursue both offshore and other domestic liquid-fuel sources if it is to avoid becoming increasingly dependent on imports.…

The St. Charles, Illinois, Community School District 303 uses solar energy and has instituted an alternative energy demonstration center. (JM)

New accommodation for school groups at the Centre for Alternative Technology in Wales enables students to estimate the impact of living on the Earth for a week. This article describes how the cabins were built and designed to teach energy decision-making lessons. (LZ)

Describes an experiment in an algebra-based introductory physics course to determine the power expenditure formulation for a person walking on a treadmill. (YDS)

The school curricula are widely believed to be the best vehicle for generating public awareness of and action related to areas of energy concern. In an attempt to build the capacity of schools to address key environmental issues in Ethiopia, a pilot project had been designed in 2004. The principal aim of the project was to bring about positive…

The last two decades have seen a rebirth of wind machines on the rural landscape. In ironic fashion the wind's kinetic energy has grown in significance through its ability to generate commercial amounts of electricity, the commodity that a few generations earlier hastened the demise of the old Great Plains windmill. Yet the reemergence of wind…

Due to a stronger dependency on biomass for energy, there is a need for improved technologies in biomass-to-energy conversion in Tanzania. This paper presents a life cycle assessment (LCA) of pyrolysis technology used for conversion of wood and wood waste to liquid biofuel. In particular, a survey of environmental impacts of the process is…