Sylvie Willis
Fossil fuels are compound mixtures of fossilized plant and animal remnants from millions of years ago. They are non-renewable resources that have been powering economies for over 150 years and currently supply about 80% of the world's energy. They are used for electricity, heating, and transportation, and are key to industrialization and rising prosperity. However, they have negative impacts on health and the climate, leading to a transition towards renewable and sustainable energy sources. With that in mind, let's explore the everyday uses of fossil fuels and their impact on our lives.
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What You'll Learn
Fossil fuels power machinery
Fossil fuels have been integral to human development, providing easily accessible energy for heat, electricity, and machinery. They have been a key driver of technological, social, and economic progress. However, due to their negative environmental impact, there is a growing movement to transition towards renewable and sustainable energy sources.
Fossil fuels, such as coal, oil, and natural gas, have been used to power machinery and drive industrial processes for over 150 years. They provide the energy needed for various industrial applications, including manufacturing, transportation, and electricity generation.
One of the primary ways fossil fuels power machinery is through the use of heat engines, which convert the heat energy of combustion into mechanical energy. This mechanical energy is then used to drive turbines, reciprocating engines, and other prime movers that provide power for rotating machinery. Fossil fuels are particularly important in industries such as textiles, plastics, and chemicals, where they can account for up to 25% of energy consumption.
In the transportation sector, oil is the most commonly used fossil fuel. It is refined into fuel oil, gasoline, and liquefied petroleum gas, powering automobiles, trucks, aircraft, and other forms of transport. The invention of the internal combustion engine significantly increased the demand for gasoline and diesel oil, both of which are derived from fossil fuels.
Additionally, fossil fuels are used in power plants to generate electricity, which can then be used to power a wide range of machinery and equipment. Coal, the most abundant fossil fuel, is widely used in thermal power stations to produce electricity. However, natural gas has largely replaced coal in countries where it is readily available, as it is less polluting and more efficient.
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Fossil fuels provide electricity
Fossil fuels have been important to human development because they can be readily burned in the open atmosphere to produce heat. The burning of fossil fuels for energy began around the Industrial Revolution, which was key to industrialization and rising prosperity. Fossil fuels (coal, oil, gas) have played, and continue to play, a dominant role in global energy systems. In 2017, fossil fuels generated 64.5% of electricity worldwide.
The burning of fossil fuels powers electricity generation. Fossil fuel power plants burn coal or oil to create heat, which is used to generate steam to drive turbines that generate electricity. In gas plants, hot gases drive a turbine to generate electricity, while a combined cycle gas turbine (CCGT) plant also uses a steam generator to increase the amount of electricity produced. Natural gas plants use gas turbines instead of steam turbines. In a gas turbine, natural gas combusts in the presence of air.
Burning fossil fuels releases carbon dioxide and other greenhouse gases into the air, contributing to climate change. In 2019, burning fossil fuels accounted for 74% of U.S. greenhouse gas emissions. Fossil fuel consumption has increased significantly over the past half-century, and while coal consumption is falling in many parts of the world, oil and gas are still growing quickly.
As low-carbon sources of energy become more readily available, the world needs to transition away from fossil fuels. Nuclear power is an environmentally friendly form of electricity generation, producing only very small amounts of greenhouse gases across the whole nuclear life cycle. Renewable energy sources such as hydropower, biomass, wind, geothermal, and solar energy are also increasingly providing a growing part of the U.S. energy mix.
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Fossil fuels are used for heating
Fossil fuels are fuels formed from the fossilized remains of dead plants and animals, exposed to heat and pressure in the Earth's crust over millions of years. They are called fossil fuels because the adjective fossil means "obtained by digging; found buried in the earth".
Fossil fuels have been important to human development because they can be readily burned in the open atmosphere to produce heat. The use of peat as a domestic fuel predates recorded history. Coal was burned in some early furnaces for the smelting of metal ores, while semi-solid hydrocarbons from oil seeps were also burned in ancient times, though mostly for waterproofing and embalming. Commercial exploitation of petroleum began in the 19th century. Natural gas deposits are also the main source of helium.
The wide-scale use of fossil fuels, coal at first and petroleum later, in steam engines enabled the Industrial Revolution. Gas lights using natural gas or coal gas also came into wide use at this time. Fossil fuels are not only burned to produce electricity or refined for use as fuel for transportation, but also for heating.
Natural gas, for example, is projected to meet an increasing share of U.S. energy demand. Its use is likely to increase in the industrial sector, where it is used as a feedstock in chemical processes and for industrial heat and power. Similarly, methane naturally generated by decomposition in landfills and manure from livestock production can be captured to produce heat and power.
In addition, fossil fuels are subsidized by governments in the form of tax breaks on consumption, such as a lower sales tax on natural gas for residential heating.
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Fossil fuels are used for transportation
Fossil fuels are used for a variety of transportation methods every day. The burning of fossil fuels for energy began around the Industrial Revolution, and they have been powering economies for over 150 years, currently supplying about 80% of the world's energy.
In the United States, about 30% of total energy consumption in 2023 was for transporting people and goods from one place to another. Petroleum products made from crude oil and natural gas processing are widely used for transportation. This includes motor gasoline, which is used in cars, motorcycles, light trucks, and boats. Aviation gasoline is used in many types of airplanes. Distillate fuels, which are mostly diesel fuel, are used by trucks, buses, and trains, as well as boats and ships. Jet fuel is used in jet airplanes and some types of helicopters, and residual fuel oil is used in ships.
Biofuels are also used in transportation and are often blended with petroleum fuels such as gasoline, diesel fuel, and jet fuel. Natural gas is used in cars, buses, trucks, and ships, and propane is used in cars, buses, and trucks, particularly in government and private vehicle fleets.
While fossil fuels have been key to industrialization and technological, social, and economic progress, they have negative impacts on health and the climate. As low-carbon sources of energy become more readily available, the world needs to transition away from fossil fuels towards renewable and sustainable energy sources.
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Fossil fuels are used in industrial processes
Fossil fuels have been important to human development because they can be readily burned in the open atmosphere to produce heat. The wide-scale use of fossil fuels, first coal and then petroleum, in steam engines enabled the Industrial Revolution. Fossil fuels are compound mixtures made of fossilized plant and animal remnants from millions of years ago. The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure.
Today, fossil fuel industries drill or mine for these energy sources, burn them to produce electricity, or refine them for use as fuel for heating or transportation. Oil is the largest source of energy-related carbon emissions, with natural gas close behind. Oil is sourced by pumping it out of underground reservoirs, or by extracting it from deposits in shale and tar sands. Crude oil is processed in refineries to create fuel oil, gasoline, liquefied petroleum gas, and non-fuel products such as pesticides, fertilizers, pharmaceuticals, and plastics. The transportation sector accounts for most oil consumption.
Natural gas deposits are the main source of helium. Natural gas is projected to meet an increasing share of US energy demand, particularly in the industrial sector, where it is used as a feedstock in chemical processes and for industrial heat and power. Coal is a solid, carbon-heavy rock that comes in four main varieties, differentiated largely by carbon content: lignite, sub-bituminous, bituminous, and anthracite. Coal is extracted via two methods: underground mining and surface mining.
The burning of fossil fuels has generated most of the energy required to power businesses and keep the lights on in our homes. Fossil fuels are used in industrial processes to power machinery, provide transportation, and generate the electricity essential to modern-day life. However, burning fossil fuels has had a negative impact on the environment and human health, contributing to air and water pollution, global warming, and climate change. As low-carbon sources of energy become more readily available, the world needs to transition away from fossil fuels towards renewable and sustainable energy sources.
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Frequently asked questions
Fossil fuels are compound mixtures made from carbon-rich remains of animals and plants that died and were gradually buried by layers of rock millions of years ago.
Fossil fuels are formed due to the heat and pressure that the fossil material is subjected to when buried deep underground. As the heat rises, the fossil molecules break apart and create transitional materials like peat from plants and kerogen from plankton. These materials can also be used as fuel sources but have less stored energy than fully formed fossil fuels.
Fossil fuels are used as sources of energy. They are burned to produce electricity, refined for use as fuel for heating and transportation, and used to power machinery.
Examples of fossil fuels include coal, oil, and natural gas.
