From Citizendium, the Citizens' Compendium
- Agriculture : The process of producing food, feed, fiber and other goods by the systematic raising of plants and animals.
- Chemistry : The science of matter, or of the electrical or electrostatical interactions of matter.
- Engineering : The profession in which a knowledge of the mathematical and natural sciences gained by study, experience and practice is applied with judgment to develop ways to economically use the materials and forces of nature for the benefit of mankind.
- Renewable energy : Energy derived from natural processes that are regularly replenished and includes solar power, wind power, hydroelectric power, geothermal energy, bioenergy, and biofuels.
- Chemical engineering : The field of engineering that deals with industrial and natural processes involving the chemical, physical or biological transformation of matter or energy into forms useful for mankind, economically and safely without compromising the environment
- Biodiesel : A substitute for petroleum-based diesel, made from biological products
- Biomass : A source of renewable energy, is biological material such as wood, wood waste, municipal solid waste, straw, sugar cane, algae, and many other byproducts derived from agricultural and forestry production as well as other sources.
- Diesel oil : An oil derived from petroleum crude oil consisting of hydrocarbons having about 10 to 17 carbon atoms and a boiling range of about 175 to 345 °C (350 to 650 °F).
- Energy (science) : A measurable physical quantity of a system which can be expressed in joules (the metric unit for a quantity of energy) or other measurement units such as ergs, calories, watt-hours or Btu.
- Ethanol : The chemical alcohol (C2H5OH) found in distilled spirits, wine and beer.
- Solar power : Energy sources based directly on the sun's electromagnetic radiation.
- Wheat : Grass crop grown worldwide and used in making flour and fermentation for alcohol production.