water pollution![click to hear](/images/speaker.jpg)
The cycle of the Earth’s waters is continuous, carrying and spreading pollutants introduced by human activity all around the planet.
El Diccionario Visual, a new valuable resource to learn Spanish. Includes 17 all-around themes to explore, including the human body, sciences and food.
intensive farming ![click to hear](/images/speaker.jpg)
To achieve maximum production, intensive farming uses chemical fertilizers responsible for various forms of air and water pollution.
animal dung ![click to hear](/images/speaker.jpg)
Animal dung introduces large quantities of nitrate into the soil; the nitrate then filters into the water table.
oil spill ![click to hear](/images/speaker.jpg)
Certain underground gas tanks leak, discharging hydrocarbons into the water table.
pesticide ![click to hear](/images/speaker.jpg)
Pesticide residue is found in the water table and in watercourses; it makes water unfit for consumption.
septic tank ![click to hear](/images/speaker.jpg)
Wastewater leakage from a dwelling’s underground tank contaminates the water table.
water table ![click to hear](/images/speaker.jpg)
Vast expanse of underground water fed by rainwater filtering through the earth; it supplies springs and can be collected in wells.
household waste ![click to hear](/images/speaker.jpg)
Burying household waste without taking any particular precautionary measures leads to contamination of the water table.
waste water ![click to hear](/images/speaker.jpg)
Untreated, it contains organic matter (e.g., bacteria, viruses) and potentially pathogenic substances that cause infection and promote the growth of algae.
oil pollution ![click to hear](/images/speaker.jpg)
Pollution caused by leaks from refineries and offshore drilling platforms, by ships emptying their fuel tanks at sea and by oil spills.
nuclear waste ![click to hear](/images/speaker.jpg)
Radioactive nuclear waste was once immersed at the bottom of the ocean; it has a life span of up to 1,000 years.
industrial waste ![click to hear](/images/speaker.jpg)
Industrial waste is highly variable; its principal components are lead, mercury, cadmium, hydrocarbons and acid deposits.