Vehicle emissions, particularly from diesel engines, are a major source of air pollution in urban areas. These emissions include particulate matter, nitrogen oxides, and hydrocarbons, which can contribute to smog formation and respiratory problems.

Industrial wastewater, agricultural runoff, and sewage discharge are all major sources of water pollution. Industrial wastewater can contain toxic chemicals and heavy metals, while agricultural runoff can carry fertilizers, pesticides, and animal waste into waterways. Sewage discharge can introduce pathogens and nutrients into water bodies, leading to eutrophication and other water quality problems.

Deposition is the process by which air pollutants are removed from the atmosphere and deposited on surfaces such as the ground, vegetation, and water bodies. This can occur through wet deposition (rain, snow, sleet, or fog) or dry deposition (direct contact with surfaces).

Eutrophication is a process in which a water body becomes enriched with nutrients, particularly nitrogen and phosphorus. This can lead to excessive growth of algae and other aquatic plants, which can deplete oxygen levels and harm aquatic life.

Ozone is a common air pollutant that can cause respiratory problems, particularly in children and individuals with asthma. It is formed through a chemical reaction between nitrogen oxides and volatile organic compounds (VOCs) in the presence of sunlight.

Self-purification is the process by which water quality is improved through natural processes such as dilution, sedimentation, and biological degradation. This process can help to remove pollutants and restore the balance of aquatic ecosystems.

E. coli is a type of bacteria that can cause gastrointestinal problems and waterborne diseases such as diarrhea, vomiting, and abdominal cramps. It is often found in water that has been contaminated with sewage or animal waste.

Advection is the process by which air pollutants are transported over long distances by wind currents. This can result in the spread of air pollution from one region to another, potentially affecting air quality in areas far from the original source of pollution.

Sulfur dioxide is a common air pollutant that can contribute to acid rain and respiratory problems. It is released into the atmosphere primarily through the burning of fossil fuels, such as coal and oil.

Phytoremediation is the process by which pollutants are removed from water through the use of plants. Plants can absorb and accumulate pollutants from the water, helping to clean and restore contaminated water bodies.

Mercury is a toxic metal that can cause neurological problems and developmental disorders, particularly in children. It can enter water bodies through industrial discharges, mining activities, and atmospheric deposition.

Transformation is the process by which air pollutants are converted into less harmful substances through chemical reactions in the atmosphere. This can occur through reactions with sunlight, oxygen, or other pollutants.

Nitrogen oxides are a group of air pollutants that can contribute to the formation of smog and ground-level ozone. They are released into the atmosphere primarily through the combustion of fossil fuels, such as gasoline and diesel.

Bioremediation is the process by which pollutants are removed from water through the use of microorganisms. Microorganisms can break down and degrade pollutants, converting them into less harmful substances.

Pesticides are a group of chemicals used to kill pests, such as insects, rodents, and weeds. They can enter water bodies through runoff from agricultural fields, improper disposal, and atmospheric deposition. Pesticides can accumulate in aquatic organisms and cause liver and kidney damage, as well as other health problems.