Carbon based remains of organic matter that has been geologically transformed into coal, oil and natural gas. Combustion of these substances releases large amounts of energy. Currently, humans are usi [..]

  An energy source formed in the Earth's crust from decayed organic material. The common fossil fuels are petroleum, coal, and natural gas.

A hydrocarbon (coal or petroleum) that can be extracted from the Earth for use as a fuel. Fossil fuels are non-renewable energy sources.

An energy source formed in the Earth’s crust from decayed organic material. The common fossil fuels are oil, coal, and natural gas.

coal, oil, or natural gas. Fossil fuels formed from the remains of ancient plants and animals.

coal, oil and natural gas geologically transformed from ancient beds of plant matter into burnable hydrocarbons. All told, these industries put 800 tons of carbon dioxide into the air every second: a sobering number given that oxygen-breathing life on Earth depends on carbon remaining locked in the ground. Although none of these fuels carries much, [..]

A general term for organic materials formed from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the earth's crust over hundreds of millions of years. [4]

coal, oil and gas. So called as they have been produced over millions of years after prehistoric forests were flooded and then overlain with sediments which compacted the material. As they are produce [..]

An energy source formed in the earth’s crust from organic material. The common fossil fuels are oil, coal, and natural gas.

A fuel based on carbon presumed to be originally from living matter, eg coal, oil, gas. Burned with oxygen to yield energy.

Materials such as coal, oil, or natural gas that were formed in the ground millions of years ago from plant and animal remains and are now used to produce heat or power; also called conventional fuels.

nonrenewable energy resource that began to form millions of years ago from remains of once-living plants and animals; provides energy and includes coal, oil, and natural gas. 

A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.

is a term representing coal, crude oil or natural gas that is formed from the fossil remains of organic material.

A fossil fuel is a fuel formed from the remains of organic materials. Fossil fuels include coal, oil, and natural gas.

Fossil fuels are coal, oil and gas. They are non-renewable resources. Fossil fuels come from ancient remains of plants and animals, compressed and heated over many millenia. The combustion of fossil f [..]

EM Fossil fuels are coal, oil and gas. They are non-renewable resources. Fossil fuels come from ancient remains of plants and animals, compressed and heated over many millenia. The combustion of foss [..]

Naturally occurring organic compounds that undergo combustion reactions to provide energy (Lesson 12)

Materials such as coal, oil or natural gas used to produce heat or power; also called conventional fuels. These materials were formed in the ground millions of years ago from plant and animal remains.

 Any naturally occurring organic fuel, such as petroleum, coal, and natural gas.

Any carbon or hydrocarbon fuel derived from the decomposition of organic material.

Fuels such as coal, oil and natural gas, which are derived from the earth and burned for heat energy. Also called conventional fuels. Alternatives include hydro (water), solar (sun), nuclear, wind, geothermal (derived from heat contained deep inside the earth) and other energy sources.

These are fuels that are formed naturally over millions of years through processes like the decomposition of dead plants and animals. Fossil fuels contain high levels of carbon and include coal, petro [..]

General term for any hydrocarbon used as fuel, including coal, oil, natural gas, and oil shale. fracture

Any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas.

any hydrocarbon deposit that can be burned for heat or power, such as coal, oil and natural gas; produces carbon dioxide when burnt.

any fuel derived from hydrocarbon deposits such as coal, petroleum, natural gas and, to some extent, peat.

An energy source formed in the Earth's crust from decayed organic material. The common fossil fuels are petroleum, coal, and natural gas.

Hydrocarbon-containing natural resources such as coal, petroleum and natural gas.

Oil, coal, natural gas or their by-products. Fuel that was formed in the earth in prehistoric times from remains of living-cell organisms. (SOURCE: California Energy Commission, http://www.consumerenergycenter.org)

Fuels that are derived from natural resources, usually in the form of coal, oil, or natural gas. There is a limited supply of these resources, and they are only located in certain parts of the world, making them subject to political and international maneuvering, and causing energy prices to be unstable.

Fuel derived from a hydrocarbon deposit such as petroleum, coal, or natural gas derived from living matter of a previous geologic time.

General term for any hydrocarbon used as fuel, including coal, oil, natural gas, and oil shale.

Any naturally occurring organic fuel, such as petroleum, coal and natural gas.

Oil, coal, natural gas, or other naturally-occurring but non-renewable hydrocarbons fuels produced by the decomposition of organic material over millions of years.

Materials such as coal, oil, and natural gas which are also called conventional fuels. Alternatives include hydro (water), solar (sun), nuclear, wind, geothermal (derived from heat contained deep inside the earth) and other energy sources.

Fuel formed from prehistoric plant or animal material, e.g. coal, oil or natural gas

Fuels dug up from beneath the earth's surface having been stored there for millions of years.

Fuel derived from ancient organic remains; e.g. peat, coal, crude oil, and natural gas.

Fuel derived from ancient organic remains; e.g. peat, coal, crude oil, and natural gas.

Fuels created by geological processes and occurring in rock formations. Includes coal, oil, and natural gas.

Fuel derived from ancient organic remains, e.g., peat, coal, crude oil, and natural gas.

is any hydrocarbon deposit that can be burned for heat or power such as coal, oil or natural gas. Fossil fuels are formed from the decomposition of ancient animal and plant remains. A major concern is [..]

A general term for combustible geologic deposits of carbon in reduced (organic) form and of biological origin, including coal, oil, natural gas, oil shales, and tar sands. A major concern is that they [..]

Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are Petroleum, Coal, and Natural Gas.

A fossil fuel is a fuel such as coal, oil or natural gas that was formed through the decomposition of ancient plant and animal life. Fossil fuels are generally burnt to release the energy stored in the chemical bonds of the hydrocarbons. A side-effect of this combustion is the release of gases such as carbon dioxide, which has been linked to global [..]

Any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas.

Carbon based remains of organic matter that has been geologically transformed into coal, oil and natural gas. Combustion of these substances releases large amounts of energy. Currently, humans are using fossil fuels to supply much of their energy needs.

Coal, oil and gas.

Coal, oil and natural gas. Fossil fuels derive from the slow decomposition of old plants or animals.

a hydrocarbon fuel, such as petroleum, derived from living matter of a previous geologic time.

Fuel such as coal, crude oil or natural gas, formed from the fossil remains of organic material.

A fuel source (such as oil, condensate, natural gas liquids, or coal) formed in the earth from plant or animal remains.

A general term for any hydrocarbon that may be used for fuel: chiefly oil, natural gas, and coal.

A fuel source (such as oil, condensate, natural gas, natural gas liquids or coal) formed in the earth from plant or animal remains.

Fuels formed by natural processes such as anaerobic decomposition of dead and buried organisms. Also fuels include coal, petroleum, and natural gas.

A general term for buried combustible geologic deposits of organic materials occurring within the Earth's crust, that can be used as a source of energy. They all contain carbon and were formed as a result of geologic processes from decayed plants and animals that have been converted to crude oil, coal, natural gas, or heavy oils hundreds of mi [..]

Oil, gas and coal are fossil fuels, formed over millions of years from the remains of plants and animals (fossils); they are hydrocarbons

a nonrenewable energy resource formed from the remains of organisms that lived long ago; examples include oil, coal, and natural gas

any hydrocarbon deposit that can be burned for heat or power, such as coal, oil and natural gas (produces carbon dioxide when burnt); fuels formed from once-living organisms that have become fossilize [..]

A fuel derived from ancient organicremains.

Natural fuel such as coal or gas formed from the remains of living organisms. Invariably carbon-rich so burning them contributes to climate change. 

Any naturally occurring organic fuel, such as petroleum, coal, and natural gas. Remains of organisms embedded in the surface of the Earth, with high carbon and/or hydrogen content, used as fuels.

 A type of resource which comes from the fossilised remains of dead plants and animals and which when burnt in combustion releases energy.

Organic-rich geological materials, such as coal, petroleum, and natural gas.