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.
hydrocarbon deposit which may be used as a fuel. e.g.. coal, oil, natural gas.
A fossil fuel is a fuel formed from the remains of organic materials. Fossil fuels include 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. Production and combustion of fossil fuels dump large amounts of CO² into the air that were not meant to be unearthed, resulting in a non-sustainable formation of the "Greenhouse Effect", which is destructive to all life on earth.
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 emit carbon dioxide into the atmosphere when burnt, thus significantly contributing to the enhanced greenhouse effect.
Natural gas, petroleum, coal, and any form of solid, liquid, or gaseous fuel derived from such materials for the purpose of creating useful heat.
Any of several types of combustible fuels formed from the decomposition of organic matter. Examples are natural gas, propane, fuel oil, oil, and coal.
A fuel (particularly petroleum products) composed of the remains of organisms that lived in the remote past. Founder effect • Random changes in allele frequencies resulting from establishment of a population by a very small number of individuals.
A fuel source, primarily oil, coal and natural gas, that originates from decayed fossils.
Any organic material (derived from the remains of formerly living things) that can be burnt to provide energy e.g. oil, coal, peat or natural gas.
Naturally occurring combustible hydrocarbon compounds, such as petroleum, coal, and natural gas.
naturally occurring, complex organic substance derived from decomposition of biological organisms; includes coal, oil, oil shale, tar sands and natural gas.
An energy resource such as oil or coal that comes from organisms that lived long ago, and thus stores solar energy that reached the Earth then.
coal, petroleum, or natural gas or any fuel derived from them.
A general term for buried combustible geologic deposits of 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. See coal, petroleum, crude oil, natural gas.
any hydrocarbon deposit that may be used for fuel such as petroleum, coal and natural gas
a fuel, such as coal, oil, and natural gas, produced by the decomposition of ancient (fossilized) plants and animals; compare to alternative energy.
A deposit of hydrocarbon such as petroleum, coal or natural gas derived from living matter of a previous geologic time. These materials are burned by industry, automobiles, and other consumers to produce energy.
Oil, coal and natural gas that originates from decayed plants and animals.
A substance found beneath the Earth's surface that can be used as a source of energy. Petroleum (which is often used to make plastic), natural gas, and coal are fossil fuels.
Any naturally occurring fuel of an organic nature formed by the decomposition of plants or animals; includes coal, natural gas and petroleum.
A carbon-rich rock material or fluid, of organic origin that can be produced and burned as a fuel. Coal, oil and natural gas are examples of fossil fuels.
A deposit of organic material containing stored solar energy that can be used as fuel. The most important are coal, natural gas, and petroleum.
A nonrenewable energy source, such as oil, gas, or coal, that derives from the organic remains of past life. Fossil fuels consist primarily of hydrocarbons.
fuel, such as coal, oil and natural gas, formed from the fossilized remains of plants that lived hundreds of millions of years ago. Fossil fuels are a nonrenewable resource and will eventually run out. Extraction of coal and oil causes considerable environmental pollution, and burning coal contributes to problems of acid rain and the greenhouse effect.
fuel consisting of the remains of organisms preserved in rocks in the earth's crust with high carbon and hydrogen content
the hydrocarbon remains of plants or animals that have been changed by natural processes; oil, coal and natural gas.
any naturally occurring carbon or hydrocarbon fuel such as coal, petroleum, peat and natural gas, formed from the decomposition of organic matter.
fuel created from deterioration of prehistoric plants. examples: oil, natural gas, coal, peat
Any deposit of fossil materials, such as petroleum, natural gas, or coal, that can be burned to produce energy
a fuel formed from the remains of once-living organisms
a fuel that consists of carbon-based molecules derived from decomposition of once-living organisms; coal, petroleum, or natural gas.
Fuels that contain primarily carbon and hydrogen, including oil, coal, and natural gas, that result in CO2 emissions when burned. Fossil Fuels are not renewable and when they run out, they are gone forever. (Also known as “hydro-carbons”).
A general term for any hydrocarbon that may be used for fuel; chiefly petroleum, natural gas and coal
Oil, coal, natural gas or their by–products. Fuel that was formed in the earth in prehistoric times from remains of living–cell organisms.
Fuels created by geological processes and occurring in rock formations. Includes coal, oil, and natural gas.
ubstances used as fuel formed from the remains of organisms in the earths crust, eg. oil, coal, natural gas. enerate To produce, or create (e.g. to generate electricity). alf Life the length of time that it takes for half of the nuclei in an element to decay. rradiation The process of exposing something (e.g. foodstuffs) to radiation.
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.
Fuel such as coal, crude oil or natural gas, formed from the fossil remains of organic material.
Materials that were formed in the ground millions of years ago from plant and animal remains such as coal, oil, or natural gas, now used to produce heat or power; also called conventional fuels.
General term for any hydrocarbon used as fuel, including coal, oil, natural gas, and oil shale.
A fuel formed millions of years ago from the remains of plant or animal material. E.g. Oil, coal, gas.
Fuel derived from a hydrocarbon deposit such as petroleum, coal, or natural gas derived from living matter of a previous geologic time.
A fuel (such as coal, oil or natural gas) that is formed in Earth from plant or animal remains.
fossil fuels (coal, oil, and natural gas) make up the biggest part of our sources of energy. They are called fossil fuels because they were formed over millions of years from dinosaur bodies and from prehistoric plants. When fossil fuels are burned, they produce pollution. Also, it takes a long time to form new fossil fuels - millions of years - and we're using up the existing ones before new ones can form. (Back to Ozone Action! Days)
A naturally occurring fuel rich in carbon and hydrogen formed by the decomposition of pre historic organisms. Fossil fuels include coal, natural gas and fuels made from crude oil such as petrol and diesel.
Solid, liquid, or gaseous fuels formed in the ground after millions of years by chemical and physical changes in plant and animal residues under high temperature and pressure. Oil, natural gas, and coal are fossil fuels.
Fuels sourced from plant and animal matter that have undergone transformation through heat and pressure.
the organic remains of plants, animals and bacteria which decayed and over millions of years formed crude oil, natural gas and coal.
Any fuel that was created by decomposed plants and animals. Burning fossil fuels creates carbon dioxide and is a large contributor to pollution.
fuels ultimately derived from living things.
An energy source formed in the Earths crust from decayed organic material. The common fossil fuels are oil, coal, and natural gas.
A naturally occurring carbon or hydrocarbon fuel such as natural gas, propane and oil, formed by the decomposition of prehistoric organisms.
Any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas.
Remains of plant and animal life that are used to provide energy by combustion; coal, oil, natural gas.
We need to be very careful with remaining stocks of non-renewable energy sources, like coal, petroleum and natural gas. Energy-awareness and conservation are the name of the game.
Coal, oil, and natural gas (and various forms of these, such as oil shales, methane clathrates and lignite). They are carbon-containing compounds formed when dead plants were buried many millions of years ago under sediments.
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 millions of years ago.
a fuel that comes from the remains of plants and animals and is formed beneath the surface of Earth over millions of years
Any hydrocarbon deposit (such as petroleum, coal, and natural gas) that can be burned for heat or power. (Source: Carbon Dioxide Information Analysis Center)
Any naturally occurring organic fuel, such as coal, crude oil, and natural gas.
Non-renewable fuel embedded in the earth for thousands of years, such as petroleum, coal and natural gas.
combustible substance derived from the decay of organic material over long periods of time and under high pressure such as natural gas, oil, propane or coal.
Any naturally occurring fuel such as coal, oil, or natural gas, all of which are commonly used to generate electricity.
Any hydrocarbon deposit that may be used for fuel e.g. petroleum, coal and natural gas.
Any fuel produced in the Earth; natural gas and oil.
A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel. All fossil fuels produce carbon dioxide when burned and are a main cause of air pollution. ( See greenhouse effect.)
A fuel that is sourced from fossilised biomass, such as oil and gas.
Carbon based fuel resulting from millions of years of biological decay. Coal, oil, and natural gas are the most common examples.
A fuel based on carbon presumed to be originally from living matter, eg coal, oil, gas. Burned with oxygen to yield energy.
Fuel derived from ancient organic remains; e.g. peat, coal, crude oil, and natural gas.
Coal, oil (from which gasoline is make), and natural gas are called fossil fuels because the chemical energy they contained is left over from plants and animals that lived long ago.
Fuels formed from the remains of plants or animals by increases in pressure and temperature and by biological and chemical processes.
Any naturally occurring organic fuel formed in the Earth's crust, such as petroleum, coal and natural gas.
A fuel (e.g., coal, oil, natural gas) that is formed in Earth from plant or animal remains.
Petroleum (oil), natural gas and coal are fossil fuels, organic materials that are high in energy. Fossils fuels are formed in a process that takes millions of years. The organic material (dead plants and animals) is covered by layers of sediment, then heat, pressure, and bacterial action change the material into pools of oil and gas (or are compressed as coal).
n: Products of partial of complete decomposition of plants and animals that occur as crude oil, coal, natural gas, or heavy oils as a result of exposure to heat and pressure in earth's crust over millions of years.
Coal, natural gas and petroleum products (such as oil) formed from the decayed bodies of animals and plants that died millions of years ago.
A fossil fuel is a naturally-ocurring, energy-rich organic (carbon-based) substance (like shale, petroleum (oil), coal, or natural gas) in the Earth's crust that was formed from ancient organic material (mostly plants).
Fossil fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals.All fossil fuels are literally "fossils", i.e., the remains of thick layers of either land vegetation or marine plankton that died millions of years ago and were then buried and folded into the earth, heated and compressed to be transformed into either a type of sedimentary rock (coal) or deposits of liquid hydrocarbons (oil and gas). See The theory that hydrocarbons were formed from these remains was first introduced by Mikhail Lomonosov in 1757. In common dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources.