Greta Jimenez
Ground pollution, also known as land pollution or soil pollution, is a serious issue that affects the health of humans, animals, and plants. It occurs when harmful materials, or pollutants, are introduced to the land and soil, causing contamination. This contamination can happen in various places, including agricultural fields that use pesticides, fertilizers, and herbicides, industrial sites that release toxic substances and hazardous materials, and urban areas where waste disposal contributes to pollution. Additionally, littering and illegal dumping of waste, such as along roadways and in forests, further contribute to ground pollution. The accumulation of solid and liquid waste materials, including hazardous substances, pesticides, heavy metals, plastics, and pharmaceuticals, leads to the deterioration of the Earth's land surfaces and the contamination of soil and water sources.
| Characteristics | Values |
|---|---|
| Causes | Human activities such as agricultural practices, industrial waste, and urban waste. Natural causes such as erosion, loss of organic carbon, increased salt content, compacting, acidification, and chemical pollution. |
| Effects | Soil degradation, water contamination, air contamination, harm to plants, animals, and humans. |
| Prevention | Changes in policy and regulation, proper waste management, sustainable agricultural practices, eco-friendly industrial practices, improved urban and transport planning, wastewater treatment, and mining waste management. |
| Sources | Landfills, dumpsites, litter, illegal dumping, industrial activities, agricultural activities, natural disasters, and terrorist activities. |
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What You'll Learn
Agricultural practices
Agriculture is a major contributor to ground pollution. About half the land area in the United States is farmland, and agricultural chemicals move into and through every component of the hydrologic system, including air, soil, soil water, streams, wetlands, and groundwater.
Agricultural pollution is the contamination released into the environment as a by-product of growing and raising livestock, food crops, animal feed, and biofuel crops. The main sources of agricultural pollution are fertilizers, pesticides, and animal waste.
Fertilizers increase the productivity of agricultural land, but they can also negatively affect groundwater and surface waters, pollute the atmosphere, and degrade soil health. Nitrogen fertilizers can be lost to the soil profile through runoff because of their high solubility. When nitrogen and phosphorus are not fully utilized by growing plants, they can be washed from farm fields and into waterways during rain events and snowmelt, and they can also leach through the soil and into groundwater over time. This can cause eutrophication of water bodies, leading to hypoxia ("dead zones") and harmful algal blooms that decrease aquatic life.
Pesticides are another major source of groundwater pollution. Pesticide leaching occurs when pesticides dissolve in water and migrate to off-target sites. Pesticides are widespread in surface water and groundwater across the United States, and they can pose risks to aquatic life, fish-eating wildlife, and drinking water supplies.
Animal waste is a significant contributor to air, soil, and water pollution. Manure management alone accounts for 12% of all agricultural greenhouse gas emissions in the United States. Bacteria and pathogens in manure can make their way into streams and groundwater if grazing, storing manure in lagoons, and applying manure to fields are not properly managed.
Other agricultural practices that contribute to ground pollution include soil erosion, nutrient loss, and the runoff of sediments, bacteria, and other contaminants. Farmers can adopt soil and water conservation practices to reduce these impacts, such as improving soil health through planting cover crops and streamside buffer crops, and adopting regenerative agriculture strategies.
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Industrial activities
One of the significant contributors to ground pollution is the release of hazardous substances and pollutants from industrial operations. This includes the improper disposal of toxic and hazardous materials, such as chemicals, heavy metals, and radioactive waste. For instance, the disposal of wastewater containing high concentrations of arsenic, mercury, and other heavy metals can contaminate soil and groundwater if not properly treated.
Coal combustion, a common industrial practice, releases radioactive trace elements and fly ash, which can pollute soil and groundwater. The leaching potential of trace elements and radionuclides from coal fly ash depends on the storage conditions and containment measures. China, as the largest mercury emitter, has coal-fired power plants that contribute to higher mercury concentrations in the surrounding soil, vegetables, and grains.
Another example is the informal recycling sector, where lead-acid batteries are recycled without proper pollution control equipment. This results in large volumes of lead-contaminated waste, which can migrate to nearby communities through various means, affecting both human health and the environment.
Furthermore, the use of synthetic fertilizers and pesticides in agriculture has increased, contributing to soil pollution. While international agreements like the Basel Convention aim to regulate the movement of hazardous waste across borders, wealthier nations sometimes export their hazardous waste to poorer countries, exacerbating the problem.
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Municipal solid waste
The composition of MSW can vary greatly from one municipality to another and can change significantly over time. In municipalities with a well-developed waste recycling system, the waste stream primarily consists of intractable wastes such as plastic film and non-recyclable packaging materials. Increased recycling of MSW can help reduce the amount of waste sent to landfills, conserve natural resources, and prevent pollution by reducing the need to collect new raw materials.
MSW is typically disposed of through landfilling or land spreading. Modern sanitary landfills are engineered facilities that dispose of solid wastes without creating nuisances or hazards to public health or safety, such as insect infestations or groundwater contamination. However, landfills can still pose a threat of pollution, and in the past, waste disposal practices have led to groundwater contamination, methane gas formation, and disease vector hazards.
Open-air waste burning and uncontrolled incineration of MSW can emit pollutants into the atmosphere, contributing to air pollution and respiratory issues in nearby populations. The incineration of MSW has also been associated with reproductive and developmental defects, cancer, and other health issues. In addition, the disposal of MSW through uncontrolled dumping and open-air incinerators can lead to land degradation, emissions of methane and hazardous leachate, and climate change.
Overall, the improper management of MSW can have significant environmental and public health impacts, and it is essential to implement effective waste management practices to mitigate these risks.
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Radioactive substances
Radioactive contamination, also known as radiological pollution, is the presence of radioactive substances in solids, liquids, gases, or on surfaces, including the human body. Radioactive contamination can be natural or man-made.
Technologically Enhanced Naturally-Occurring Radioactive Materials (TENORM) are found in almost all soils, rocks, surface water, and groundwater. TENORM is a result of industrial processes that bring natural resources from below the surface to above the ground, thereby bringing up materials that naturally contain radionuclides. Radium, radon, uranium, potassium, and thorium are common radionuclides found in TENORM. TENORM can also be a result of oil and gas extraction processes, where radioactive elements are found in rock cuttings, flowback water, produced water, and pipe scale.
Man-made radioactive contamination can occur due to the release of radioactive gases, liquids, or particles. For example, the accidental spill of a radionuclide used in nuclear medicine can contaminate the surrounding environment as people walk around. Nuclear fuel reprocessing can also inevitably lead to the release of radioactive xenon. Nuclear fallout from the 520 atmospheric nuclear explosions that took place from the 1950s to the 1980s has also contributed to radioactive contamination.
The improper manufacturing, use, storage, or disposal of radioactive materials can contaminate buildings and the environment. Radioactive waste, a by-product of industries such as mining, nuclear power generation, defense, medicine, and scientific research, can pose risks to human health and the environment if not properly managed. High-level waste, including used nuclear fuel and reprocessed nuclear waste, is currently stored at the sites where it was generated. Transuranic waste, which includes contaminated common items from nuclear weapons research, is stored at federal facilities, with plans to dispose of it at the Waste Isolation Pilot Plant (WIPP) in New Mexico. Uranium mill tailings, another form of radioactive waste, are stored at production sites in impoundments.
The U.S. Environmental Protection Agency (EPA) identifies and addresses radioactively contaminated sites through its Superfund program. The EPA evaluates potential Superfund sites and determines whether they should be included on the National Priorities List for cleanup. During the cleanup process, workers educate the surrounding community about the hazards associated with the site and involve them in planning.
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Illegal dumping
The consequences of illegal dumping are far-reaching and detrimental. One of the most significant impacts is the contamination of soil and water. As waste materials degrade, they release chemicals and microparticles, leading to soil pollution. This pollution can then migrate into nearby water sources, affecting both surface and groundwater. Contaminated water can be taken up by plants and animals, ultimately reaching the human food chain and drinking water supplies.
The health risks associated with illegal dumping are severe. The presence of toxic waste and the breeding of disease-carrying insects and animals can lead to short-term health issues such as asthma, stress, headaches, and infections. Long-term exposure to contaminated sites can result in more serious illnesses, including various types of cancer and other diseases. The environmental impact extends beyond pollution, as illegal dumps can also lead to land deterioration and a decline in property values.
To combat illegal dumping, several strategies can be employed. Increasing community use of dumping areas and transforming them into valued open spaces can deter illegal dumping. Adding physical barriers, such as fencing and locked gates, has proven effective in reducing illegal waste disposal. Increasing the risk of arrest for offenders is another deterrent. Improving public awareness about the environmental, health, and economic consequences of illegal dumping is essential, as a lack of knowledge contributes to the issue.
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Frequently asked questions
Ground pollution occurs in areas where human activity introduces harmful materials into the environment. This includes agricultural practices, industrial activities, and waste disposal sites.
Ground pollution can occur in a variety of places, including:
- Military bases and defense sites
- Industrial sites and factories
- Urban areas and cities
- Roadways and transportation hubs
- Illegal dumps and landfills
Human activities that contribute to ground pollution include:
- Agricultural practices that use pesticides, fertilizers, and herbicides
- Industrial processes that release toxic chemicals and waste
- Poor waste management practices, such as illegal dumping and littering
- Use of hazardous substances, such as lead paint and heavy metals
