Helena Joyce
Natural gas is a fossil fuel that is a major contributor to air pollution, water pollution, and climate change. Natural gas is primarily composed of methane, a potent greenhouse gas with a global warming potential 21 times higher than carbon dioxide over a 100-year period. The extraction and transportation of natural gas often result in methane leaks, exacerbating its impact on global warming. Additionally, the construction of natural gas infrastructure can contaminate nearby water sources and impact vulnerable communities. Furthermore, the combustion of natural gas releases nitrogen oxides, formaldehyde, and carbon monoxide, which can trigger respiratory issues and asthma. While natural gas burns cleaner than coal or petroleum, emitting fewer carbon dioxide and air pollutant emissions, the leaks throughout its journey and the health impacts of its combustion highlight the polluting effects of natural gas.
| Characteristics | Values |
|---|---|
| Air pollution | Nitrogen oxides, carbon monoxide, formaldehyde, sulfur dioxide, particulates, mercury, volatile organic compounds |
| Water pollution | Hydraulic fracturing fluid, wastewater, chemical spills, equipment runoff |
| Climate change | Methane leaks, carbon dioxide emissions |
| Health risks | Respiratory issues, asthma, coughing, wheezing, difficulty breathing, hospitalization |
| Environmental impacts | Erosion, aquatic contamination, habitat fragmentation, reduced surface waters, groundwater contamination |
| Social impacts | Disproportionately affects low-income communities, Indigenous communities, and communities of color |
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What You'll Learn
- Natural gas leaks from wells, storage tanks, pipelines, and processing plants
- Flaring of natural gas produces CO2, carbon monoxide, sulfur dioxide, and nitrogen oxides
- Natural gas infrastructure is often built near low-income communities and communities of colour
- Natural gas stoves release methane and other pollutants, exposing people to respiratory diseases
- Hydraulic fracturing can contaminate groundwater with fracking fluids, gases, and hazardous chemicals
Natural gas leaks from wells, storage tanks, pipelines, and processing plants
Well drilling activities can result in the release of natural gas into the atmosphere, and the process of hydraulic fracturing, or fracking, used to extract natural gas can produce large volumes of contaminated water that require proper treatment to prevent pollution of land and water sources. The U.S. Environmental Protection Agency (EPA) has established guidelines to reduce methane and other harmful air pollutant emissions during well drilling.
Pipelines that transport natural gas are also a source of leaks. Underground pipeline leaks can result in methane buildup and migration through the soil, with the potential to affect vegetation and wildlife. The U.S. EPA has implemented the Natural Gas STAR Program to address equipment leaks, which are unintentional emissions from components such as connectors, valves, and storage tank thief hatches. Regular inspection and maintenance are necessary as leaking components may develop leaks again even after repair.
Storage tanks and processing plants are additional sources of natural gas leaks. Fugitive emissions from processing plants have been studied, and the EPA has measured methane emissions from gathering facilities and processing plants. Natural gas leaks from storage tanks can be due to worn or damaged gaskets on thief hatches, which can result in improper sealing.
The release of natural gas through leaks contributes to air pollution and has health impacts. Natural gas stoves, for example, can expose users to respiratory disease-triggering pollutants, including formaldehyde, carbon monoxide, and nitric oxides. These emissions can be reduced through the use of hoods and ventilation during cooking. Overall, natural gas leaks from wells, storage tanks, pipelines, and processing plants have environmental and health implications, underscoring the importance of addressing and mitigating these leaks to reduce their impact on the atmosphere and human well-being.
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Flaring of natural gas produces CO2, carbon monoxide, sulfur dioxide, and nitrogen oxides
Natural gas is a fossil fuel composed primarily of methane (CH4). It is formed from ancient plant material deposited in an oxygen-poor environment and cooked over millions of years by heat from the earth. Natural gas is a major contributor to air pollution, water pollution, and climate change.
Natural gas flaring, a common practice at well sites, produces significant amounts of air pollutants. Flaring is often done when it is not economical to transport the gas or when it contains high concentrations of toxic hydrogen sulfide. While flaring is safer than releasing unburnt natural gas into the atmosphere, it still contributes to air pollution and climate change.
Flaring of natural gas produces CO2, carbon monoxide, sulfur dioxide, nitrogen oxides, and other compounds, depending on the chemical composition of the gas and how well it burns. CO2 emissions from natural gas flaring and combustion have environmental and health impacts that need to be addressed to mitigate their effects.
The combustion of natural gas in vehicles also contributes to greenhouse gas emissions and other pollutants, including nitrogen oxides, sulfur, mercury, and particulates. Overall, while natural gas combustion produces fewer emissions than some other fossil fuels, it still contributes to air pollution and climate change.
In addition to the pollutants produced by flaring and combustion, natural gas leaks at every part of its journey: from the well, during transportation along pipelines, at power plants, and in homes and businesses where it is burned. This results in the release of methane, a potent greenhouse gas, into the atmosphere.
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Natural gas infrastructure is often built near low-income communities and communities of colour
Natural gas is a fossil fuel and a major contributor to air pollution, water pollution, and climate change. It is composed mainly of methane, a potent greenhouse gas, along with carbon dioxide and water vapour. While burning natural gas produces fewer emissions of most types of air pollutants and carbon dioxide compared to burning coal or petroleum, natural gas infrastructure and its construction are significant sources of pollution.
Natural gas wells and pipelines often have engines that produce air pollutants and noise. The construction of wells and pipelines can cause erosion and the contamination of nearby water sources with harmful chemicals and pollutants. This is particularly concerning for communities living nearby, as they are exposed to these pollutants, which can have negative health impacts.
The natural gas industry has a history of building its high-polluting processing plants near the homes of low-income people and people of colour. This pattern of environmental racism has been deliberately chosen by the industry to leverage its political, economic, and regulatory power. As a result, rural, Indigenous, and BIPOC communities have suffered the most from the negative impacts of natural gas infrastructure.
In addition to the environmental and health risks posed by natural gas infrastructure, there are also social and economic consequences for these vulnerable communities. The construction and operation of natural gas facilities can lead to the displacement of residents, disruption of local ecosystems, and decreased property values.
Furthermore, natural gas leaks from pipelines, wells, and infrastructure are a significant source of methane emissions, contributing to global warming. Methane is a powerful greenhouse gas, and even small leaks can have a substantial impact on the climate. The release of methane and other pollutants through leaks and incomplete combustion of natural gas stoves can expose users to respiratory disease-triggering pollutants.
Overall, the construction and operation of natural gas infrastructure have disproportionate impacts on low-income communities and communities of colour, exacerbating existing social and economic inequalities and contributing to environmental injustice.
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Natural gas stoves release methane and other pollutants, exposing people to respiratory diseases
Natural gas is a fossil fuel and a major contributor to air pollution, water pollution, and climate change. Natural gas stoves, in particular, have been found to release methane and other pollutants, exposing people to respiratory diseases.
Methane is a greenhouse gas, and its release from natural gas stoves contributes to climate change. Stanford researchers estimate that the methane leaking from natural gas stoves in U.S. homes has a significant climate impact, comparable to the carbon dioxide emissions from about 500,000 gasoline-powered cars. This is due to both the generation of carbon dioxide through the combustion of natural gas and the release of unburned methane into the air through leaks and incomplete combustion.
In addition to methane, natural gas stoves emit other harmful pollutants, including nitrogen oxides, carbon monoxide, formaldehyde, and benzene. These pollutants can trigger respiratory problems such as asthma, coughing, wheezing, and difficulty breathing, which can occasionally result in hospitalization. The use of hoods and ventilation can help reduce the concentrations of these pollutants in kitchen air, but surveys show that home cooks often do not use them consistently.
The impact of natural gas stove pollution is particularly concerning given the number of households that use them. Over one-third of U.S. households, or more than 40 million homes, cook with gas stoves. The proximity of these stoves to living areas means that users are directly exposed to the emissions, increasing the risk of respiratory issues.
The health and environmental concerns associated with natural gas stoves have led to growing calls for switching to electric stoves, which do not rely on methane gas and can reduce greenhouse gas emissions and indoor air pollution. Some states, such as Massachusetts, are even offering rebates to residents who swap their gas stoves for electric or induction stoves.
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Hydraulic fracturing can contaminate groundwater with fracking fluids, gases, and hazardous chemicals
Hydraulic fracturing, or fracking, is a method used to extract natural gas and oil from deep rock formations. The process involves forcing water, sand, and chemicals into horizontally drilled wells, causing the rock to crack and release natural gas or oil. This process can contaminate groundwater in several ways.
Firstly, spills during the management of hydraulic fracturing fluids and chemicals can result in large volumes or high concentrations of chemicals reaching groundwater resources. The injection of hydraulic fracturing fluids into wells with inadequate mechanical integrity can also allow gases or liquids to move into groundwater resources. In addition, the direct injection of hydraulic fracturing fluids into groundwater resources can cause contamination.
Improperly installed wells, chemical spills from trucks or tanks, and ineffective containment of flowback (the water used in the hydraulic fracturing process that flows out of the well) can also lead to groundwater contamination. The EPA has found scientific evidence that hydraulic fracking activities can impact drinking water resources, although the extent of contamination is not yet fully understood.
The hydraulic fracturing fluids used to fracture rock formations contain chemicals that could be harmful to human health and the environment if they enter drinking water supplies. These chemicals, along with those that surface with the natural gas, can also affect air quality. The specific chemicals used in hydraulic fracturing are often not disclosed, making it challenging to fully understand the potential dangers to local communities and the environment.
Furthermore, the wastewater generated during hydraulic fracturing can contain hazardous chemicals and must be properly treated and disposed of to prevent groundwater contamination. The disposal of inadequately treated hydraulic fracturing wastewater in surface water resources or unlined pits can result in groundwater contamination.
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Frequently asked questions
Natural gas is a fossil fuel, and when burned, it releases fewer air pollutants and carbon dioxide emissions than coal or petroleum products. However, it still emits nitrogen oxides, carbon monoxide, formaldehyde, and other pollutants that can trigger respiratory issues. Additionally, methane leaks occur during extraction, transportation, and from infrastructure, contributing to global warming.
Natural gas extraction through hydraulic fracturing, or fracking, can contaminate groundwater and surface water. Fracking produces large amounts of wastewater, which may contain chemicals and contaminants. Improperly constructed wells can leak gas and fracking fluids into groundwater, impacting drinking water sources.
Natural gas is a fossil fuel, and its extraction and combustion contribute to greenhouse gas emissions, primarily through methane leaks and carbon dioxide releases. While burning natural gas produces fewer emissions than coal or oil, the leakage of methane, a potent greenhouse gas, significantly contributes to global warming.
