any fuel derived from hydrocarbon deposits such as coal, petroleum, natural gas and, to some extent, peat; these fuels are irreplaceable, and their burning generates the greenhouse gas carbon dioxide
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 that they emit carbon dioxide into the atmosphere when burnt, a major contributor to the enhanced greenhouse effect
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
fuel, such as coal, oil, and natural gas, formed from the fossilized remains of plants that lived hundreds of millions of years ago free port port or sometimes a zone within a port, where cargo may be accepted for handling, processing, and reshipment without the imposition of tariffs or taxes Free ports are established to take advantage of a location with good trade links freeze-thaw form of physical weathering, common in mountains and glacial environments, caused by the expansion of water as it freezes Water in a crack freezes and expands in volume by 9% as it turns to ice This expansion exerts great pressure on the rock, causing the crack to enlarge After many cycles of freeze-thaw, rock fragments may break off to form scree slopes
A combustible solid, liquid, or gaseous material, rich in carbon, formed from the remains of plants and animals Common fossil fuels include coal, natural gas, and derivatives of petroleum such as fuel oil and gasoline
A carbon or hydrocarbon fuel formed in the ground from the remains of dead plants and animals It takes millions of years to form fossil fuels Oil, natural gas, and coal are fossil fuels
Fossil fuel is fuel such as coal or oil that is formed from the decayed remains of plants or animals. A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel. a fuel such as coal or oil that is produced by the very gradual decaying of animals or plants over millions of years. Any of a class of materials of biologic origin occurring within the Earth's crust that can be used as a source of energy. Fossil fuels include coal, petroleum, and natural gas. They all contain carbon and were formed as a result of geologic processes acting on the remains of (mostly) plants and animals that lived and died hundreds of millions of years ago. All fossil fuels can be burned to provide heat, which may be used directly, as in home heating, or to produce steam to drive a generator for the production of electricity. Fossil fuels supply nearly 90% of all the energy used by industrially developed nations
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)
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
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
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
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