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land pollution ![click to hear : land pollution click to hear : land pollution](../../images/speaker-vert.gif)
Numerous factors contribute to soil pollution (e.g., household and industrial waste, fertilizers, pesticides).
intensive husbandry ![click to hear : intensive husbandry click to hear : intensive husbandry](../../images/speaker-vert.gif)
Animal dung introduces large quantities of nitrate into the soil; the nitrate then filters into the water table.
nonbiodegradable pollutants ![click to hear : nonbiodegradable pollutants click to hear : nonbiodegradable pollutants](../../images/speaker-vert.gif)
Products that cannot be completely decomposed by living organisms.
industrial pollution ![click to hear : industrial pollution click to hear : industrial pollution](../../images/speaker-vert.gif)
Most nonbiodegradable soil pollutants are produced by industry, which discharges more than 700 different substances.
domestic pollution ![click to hear : domestic pollution click to hear : domestic pollution](../../images/speaker-vert.gif)
Pollution generated by an increase in household waste and detergent spilled into wastewater.
industrial waste ![click to hear : industrial waste click to hear : industrial waste](../../images/speaker-vert.gif)
Some of it is treated in the same manner as household waste, while other forms containing toxic substances are processed at specialized sites.
household waste ![click to hear : household waste click to hear : household waste](../../images/speaker-vert.gif)
It is composed mostly of biodegradable organic matter but also contains plastics, detergents, solvents and heavy metals.
authorized landfill site ![click to hear : authorized landfill site click to hear : authorized landfill site](../../images/speaker-vert.gif)
Land that is filled with household and industrial waste and then covered with successive layers of earth.
waste layers ![click to hear : waste layers click to hear : waste layers](../../images/speaker-vert.gif)
Each waste layer is sealed using a plastic film or a base layer of clay.
intrusive filtration ![click to hear : intrusive filtration click to hear : intrusive filtration](../../images/speaker-vert.gif)
In spite of the sealing of waste layers, rainwater runoff allows certain pollutants to seep into the subsoil.
fungicide ![click to hear : fungicide click to hear : fungicide](../../images/speaker-vert.gif)
It is used to destroy parasitic fungi on crops.
pesticide ![click to hear : pesticide click to hear : pesticide](../../images/speaker-vert.gif)
Product (insecticide, herbicide or fungicide) that destroys harmful organisms. It sometimes enters the food chain and affects flora and fauna.
herbicide ![click to hear : herbicide click to hear : herbicide](../../images/speaker-vert.gif)
It is used to destroy or limit the growth of plants harmful to crops.
fertilizer application ![click to hear : fertilizer application click to hear : fertilizer application](../../images/speaker-vert.gif)
The excessive use of fertilizers leads to an increased quantity of mineral compounds in the soil and in farmed crops.
agricultural pollution ![click to hear : agricultural pollution click to hear : agricultural pollution](../../images/speaker-vert.gif)
It has developed with the intensification of agriculture and the large-scale use of fertilizers and pesticides.