Forms of energy that are constantly and rapidly renewed by natural processes such as solar, ocean wave, and wind energy. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Energy transmitted from the sun in the form of electromagnetic radiation.

Planned management, use, and preservation of energy resources.

Materials or phenomena which can provide energy directly or via conversion.

The motion of air relative to the earth's surface.

Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS).

Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are petroleum, coal, and natural gas.

Devices that control the supply of electric current for running electrical equipment.

Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.

The protection, preservation, restoration, and rational use of all resources in the total environment.

The chemical reactions involved in the production and utilization of various forms of energy in cells.

Total number of calories taken in daily whether ingested or by parenteral routes.