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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The four stages in coal formation are peat, lignite, bituminous and anthracite. Each of these stages must be completed for coal to form. More »

Coal is formed in a swampy depositional environment that includes the remains of trees and shrubs. This swampy environment is able to bury plant life quickly before it rots. Once buried, the plant life is heated and comp... 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 »

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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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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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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