The primary use of coal is as a source of energy. Nations around the world use coal to produce electricity. Steel manufacturers also use coal to create a fuel called coke. Coal is formed from plants that were buried in t... More »

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Chemical energy is that which is either released or absorbed when a chemical reaction takes place, such as the release of heat and electrical energy from a hydrogen fuel cell. Another example is the heat release derived ... More »

Coal is cheap, making it especially useful for developing nations, but it also releases carbon dioxide and particulate matter. Coal reserves are high in many nations. Coal plants are also relatively simple and are easy t... More »

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North American trains primarily use diesel fuel as their source of energy.. Electric locomotives are in widespread use in Europe and Asia and in some commuter runs in the United States. More »

Liquefied Petroleum Gas is a clean energy source derived from hydrocarbons such as butane and propane. It’s produced when crude oil is being refined and during the extraction of natural gas and oil from the earth. At nor... More »

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Ethanol fuel is a renewable and biodegradable source of energy that helps reduce greenhouse gas emissions, while corn-based ethanol offers positive energy balance and creates usable by-products, such as corn oil. Ethanol... More »

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Natural gas is an important source of energy with commercial and industrial uses and for domestic consumption in private homes. Natural gas is easily transformed into energy but is also used for heating houses and poweri... More »

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