Sylvie Willis
Fossil fuels, such as coal, oil, and gas, are the predominant source of electricity generation globally. In 2017, fossil fuels generated 64.5% of worldwide electricity, with this figure remaining relatively stable over the past few decades. The use of fossil fuels for electricity generation varies by country, with some relying more heavily on these sources than others. For example, in the United States, about 60% of electricity generation in 2023 came from fossil fuels, while nuclear energy accounted for about 19% and renewable energy for about 21%. The environmental impact of fossil fuel-generated electricity is a key concern, with emissions contributing to air pollution and climate change. As a result, there is a growing focus on transitioning to cleaner sources of energy, such as nuclear and renewable alternatives, to reduce carbon emissions and mitigate the effects of climate change.
| Characteristics | Values |
|---|---|
| Energy Sources | Fossil fuels (coal, natural gas, petroleum, oil), nuclear fuels, renewable energy |
| Electricity Generation | Steam turbines, gas turbines, hydro (water) turbines, wind turbines, solar photovoltaics |
| Fossil Fuel Generation in 2023 | 60% of electricity generation in the US |
| Fossil Fuel Generation in 2022 | 60% of electricity generation in the US |
| Fossil Fuel Generation in 2017 | 64.5% of worldwide electricity |
| Fossil Fuel Generation in 1990 | 61.9% of worldwide electricity |
| US Energy Sources in 2022 | Natural gas (39.8%), coal (19.7%), nuclear (18.2%) |
| US Energy Sources in 2023 | Petroleum (0.4%), other gases and sources (0.5%), nuclear energy (18%) |
| Environmental Impact | Fossil fuels are the largest source of global CO2 emissions; coal is the largest single source of sulfur dioxide emissions and the second-largest source of nitrogen oxides |
| Efficiency | Average coal plant: 35% efficient; Best coal plants: 42% efficient; Natural gas plants: 60% efficient; Internal combustion engines in cars: 25% efficient |
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What You'll Learn
- Fossil fuels are the largest source of global carbon dioxide emissions
- Fossil fuels are the most common fuel type for electricity production
- Fossil fuels are dominant worldwide, despite strong growth in renewables
- Fossil fuel plants require large quantities of coal, oil or gas
- Fossil fuel-fired power plants are a leading source of air pollution
Fossil fuels are the largest source of global carbon dioxide emissions
The burning of fossil fuels is a major contributor to global carbon dioxide emissions. Fossil fuel use is the primary source of carbon dioxide, with coal, oil, and natural gas being the largest emitters. In 2018, 89% of global carbon dioxide emissions were attributed to fossil fuels and industry, with coal being responsible for over 0.3 degrees Celsius of the 1-degree increase in global average temperatures. Oil releases a significant amount of carbon when burned, accounting for about a third of the world's carbon emissions. Natural gas, while promoted as a cleaner alternative, still accounts for a fifth of global carbon emissions.
The use of fossil fuels for electricity generation is a significant contributor to carbon dioxide emissions. In 2023, about 60% of electricity generation in the United States was from fossil fuels, including coal, natural gas, petroleum, and other gases. In 2017, fossil fuels generated 64.5% of worldwide electricity, and this number continues to increase. The production and transportation of fossil fuels can also result in potential supply issues and higher consumer prices due to volatile fuel prices.
The impact of fossil fuel emissions on global warming is significant. The Intergovernmental Panel on Climate Change (IPCC) warns that to limit global warming to 1.5 degrees Celsius above pre-industrial levels, fossil fuel emissions must be halved within 11 years. However, global commitments to reduce carbon emissions, such as the Paris Agreement, have not been sufficient. The UN Environment Programme predicts that by 2030, the world will produce more than double the amount of coal, oil, and gas necessary to meet this target.
While there has been a strong growth in renewable energy sources, fossil fuels remain dominant in the energy sector. In emerging market and developing economies, energy-related carbon dioxide emissions increased in 2024 due to rising energy demands. India's energy-related carbon dioxide emissions rose by 5.3% in 2024, the highest among major economies, due to rapid economic growth and surging energy demand. Advanced economies, on the other hand, showed a decline in emissions due to the deployment of low-emission energy sources, with renewables and nuclear power accounting for over 50% of electricity generation.
To combat the negative impact of fossil fuels on the environment, a transition to renewable and low-carbon energy sources is necessary. Nuclear power, hydroelectricity, wind, and solar energy are some alternatives that can help reduce carbon dioxide emissions and mitigate climate change. Additionally, improving energy efficiency and reducing energy demand through sustainable land management practices can also contribute to lowering global carbon dioxide emissions.
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Fossil fuels are the most common fuel type for electricity production
Fossil fuels are the dominant source of energy for electricity generation worldwide. In 2017, fossil fuels generated 64.5% of the world's electricity, with this figure only rising in the following years. The primary sources of electricity from fossil fuels are coal, natural gas, and petroleum, with coal being the largest single source of electricity globally.
In the US, fossil fuels are also the most common fuel type for electricity production. In 2023, about 60% of electricity generation was from fossil fuels, with natural gas being the primary fuel type, accounting for about 39.8% of total energy production. Coal was the second most common fuel type, making up 19.7% of electricity production. Other fossil fuels, such as petroleum, residual fuel oil, distillate fuel oil, and other gases, made up the remaining 20% of US electricity generation from fossil fuels.
The use of fossil fuels for electricity generation has several impacts on the environment. Fossil fuel-fired power plants are a leading source of air pollution, with coal combustion being the largest single source of sulfur dioxide (SO2) emissions and the second-largest source of nitrogen oxides (NOX), which contribute to fine particulate matter (PM) pollution. The price of fossil fuels can also be volatile, with sharp rises during times of shortage or geopolitical instability, leading to unstable generation costs and higher consumer prices.
Despite the environmental and economic concerns associated with fossil fuels, they continue to be the dominant source of electricity generation due to their reliability and affordability. Fossil fuel power plants can run for many months without interruption, providing large amounts of electricity regardless of the time of day, weather, or season. Additionally, the infrastructure for fossil fuel electricity generation is already well-established, making it a convenient choice for many countries.
However, there is a growing trend towards renewable and nuclear energy sources for electricity generation. In the US, nuclear energy accounted for about 18-19% of electricity generation in 2023, while renewable energy sources made up about 21%. Globally, more than a third of electricity comes from low-carbon sources, with renewables making up a larger portion than nuclear energy. The transition towards cleaner energy sources is crucial to mitigate climate change and reduce air pollution.
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Fossil fuels are dominant worldwide, despite strong growth in renewables
Fossil fuels have been the primary source of energy for electricity generation since the Industrial Revolution. They include coal, oil, natural gas, and other gases, and are used in fossil-fuelled power plants to generate electricity. In 2017, fossil fuels generated 64.5% of worldwide electricity, a slight increase from 61.9% in 1990. This trend has continued, and in 2023, fossil fuels accounted for 82% of the global energy mix, with coal, oil, and natural gas being the dominant energy sources.
Despite strong growth in renewable energy sources, such as wind, solar, and hydropower, fossil fuels remain dominant worldwide. This dominance is evident in the slow transition to renewables, with the share of fossil fuels in the energy mix remaining unchanged despite record-high contributions from renewables. For instance, in the US, about 60% of electricity generation in 2023 came from fossil fuels, while renewables accounted for only 21%. Similarly, in the UK, the electricity grid suffers transmission and distribution losses, with coal and natural gas still being significant sources of electricity.
However, there are signs of change. China, for instance, has aggressively invested in clean energy technologies, including solar panels, wind turbines, and batteries, driving down the prices of these technologies globally. This has contributed to a decline in fossil fuel use in China, with an 84% increase in electricity demand being met by solar and wind power in 2024. Additionally, in Europe, fossil fuel use dipped below 70% for the first time, leading to a significant decrease in CO2 emissions.
The continued dominance of fossil fuels has significant implications for the global climate and human health. Fossil fuels are responsible for three-quarters of global greenhouse gas emissions and contribute to local air pollution, causing at least 5 million premature deaths annually. To mitigate climate change and reduce air pollution, a rapid shift towards low-carbon energy sources, including nuclear and renewable technologies, is necessary. While renewable energy sources are growing quickly and will play a vital role in tackling climate change, fossil fuels still dominate the global energy mix, highlighting the need for further efforts to reduce carbon emissions and increase low-carbon energy sources.
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Fossil fuel plants require large quantities of coal, oil or gas
Fossil fuels are the largest source of energy for electricity generation worldwide. In 2017, fossil fuels generated 64.5% of worldwide electricity, a figure that has remained relatively stable over the past few decades. In 2023, about 60% of electricity generation in the United States was from fossil fuels, including coal, natural gas, petroleum, and other gases.
Fossil fuel plants require very large quantities of coal, oil, or gas to generate electricity. The fuels need to be transported over long distances, which can result in potential supply issues. The price of these fuels can be volatile and is subject to sharp increases during shortages or geopolitical instability, leading to unstable generation costs and higher consumer prices.
Coal is the largest source of electricity globally and remains dominant in many countries. However, some countries, like the UK, have seen a significant shift away from coal in recent years. Oil accounts for only a small share of electricity production, with most oil being used for other purposes after being refined into products such as fuel oil, gasoline, liquefied petroleum gas, pesticides, fertilizers, pharmaceuticals, and plastics.
Natural gas is the second-largest source of electricity production globally. While it emits less carbon dioxide and other air pollutants than coal, leaks from natural gas plants, wells, and pipelines release methane, a potent greenhouse gas, into the atmosphere. Despite the environmental concerns, the use of natural gas is projected to increase due to its low price and industrial applications.
As the world transitions to cleaner sources of energy, the role of fossil fuels in electricity generation is expected to decrease. Renewable energy sources, such as solar, wind, hydropower, and biomass, are gaining traction and contributing to a larger share of electricity production in some countries. Nuclear energy, which does not produce greenhouse gases during electricity generation, is also an important part of the low-carbon energy mix.
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Fossil fuel-fired power plants are a leading source of air pollution
Fossil fuels, including coal, natural gas, petroleum, and other gases, are used to generate electricity. In 2023, about 60% of electricity generation in the United States came from these sources, and they remain dominant worldwide, with a global share of 64.5% in 2017.
SO2 emissions from coal-fired power plants are linked to adverse health effects, including heart and lung ailments, aggravated asthma, and an increased risk of heart attacks. Additionally, elevated concentrations of ground-level ozone and fine particles can result in serious health issues such as asthma attacks, stroke, and respiratory infections. Mercury emissions from power plants, which affect the nervous system and brain functions, are particularly dangerous for infants and children.
The impact of power plant emissions extends beyond the immediate vicinity of the plants. Air pollution can travel long distances, affecting communities located miles away. Power plants also contribute to water pollution by discharging toxic metals and other contaminants into water bodies. The disposal of coal ash, which contains mercury, cadmium, arsenic, and other toxins, further exacerbates land pollution.
While steps have been taken to reduce these pollutants, concerns remain. The transition to cleaner energy sources and the adoption of emerging technologies, such as carbon capture and storage (CCS), are crucial to mitigating the environmental and health impacts of fossil fuel-fired power plants.
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Frequently asked questions
In 2017, fossil fuels generated 64.5% of worldwide electricity, with coal and gas being the most common sources. In the US in 2023, fossil fuels generated about 60% of electricity.
Fossil fuels are fuels made from the remains of dead plants and animals. Fossil fuels include coal, oil, and natural gas.
Power plants burn fossil fuels to generate electricity. Steam boilers burn fuel to heat water and produce steam, which turns turbines to generate electricity. Combustion turbines burn fuel to create exhaust gases, which spin turbines to generate electricity.
Fossil fuels are the largest source of global carbon dioxide (CO2) emissions. Fossil fuel-fired power plants are a leading source of air pollution, particularly sulfur dioxide (SO2) and nitrogen oxide (NOX) emissions. There are technological, operational, and management options to reduce emissions from fossil fuel power plants, such as carbon capture utilization and storage (CCUS). However, it is important to transition to cleaner sources of energy, such as nuclear and renewables, to reduce air pollution.
