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اضرار التلوث بالانجليزية

اضرار التلوث بالانجليزية



اضرار التلوث بالانجليزية

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The different pollutants of indoor air

In our homes there are several types of pollutants of many and varied origins, which have equally diverse consequences on our health.

Biological pollutants

Pollution and health: these substances that poison indoor air
Infectious agents (bacteria, viruses, toxins) come from living beings, or can proliferate in some poorly maintained equipment (ventilation, etc.) Mold can lead to infections such as nosocomial invasive aspergillosis. Allergens come from pets, plants, molds, insects and mites.

Chemical pollutants

Very often found in the indoor air:

Carbon monoxide (CO): a colorless, odorless and deadly gas with a high concentration. Heating or hot-water heating appliances are disengaged when they are old or poorly adjusted. The symptoms of intoxication are: headache, dizziness, blurred vision, nausea, weakness of the legs, drowsiness, syncope ...
Volatile organic compounds or VOCs (formaldehyde, organic solvents, glycol ethers, hydrocarbons ...): they are found in new or recently renovated buildings. They can be released by many materials: glues, paints, cleaning products, chemical perfumes, felts, but also so-called "natural" materials such as treated wood. Most are carcinogenic.
lead in old paintings causes anemia and irreversible damage to the central nervous system
phthalates contained in plastic, they cause reproductive disorders.
Particles and fibers

Dust contains particles, the smallest of which can be inhaled. It also contains smoke, soot, pollen, spores and allergens. Fibers are particles emitted by certain materials (cellulose, hemp, sisal, asbestos, glass wool, rock ...). Some activities such as DIY, cooking or cleaning emit significant amounts of particles and fibers that remain suspended in the air.

Asbestos is infamous because it is very carcinogenic.

Radioactive gases

Radon is a natural radioactive gas contained in soil and rock all over the world, at varying concentrations depending on the nature of the soil and the degree of containment of the site.

It is not perceptible (painless, colorless) and nevertheless dangerous, indeed, radon is a definite pulmonary carcinogen for humans and belongs to group I in the classification of the International Center for Research on Cancer (CIR). As such, "exposure to radon is one of the major risk factors in environmental health and this gas is significantly involved in the occurrence of a particularly common and serious disease: lung cancer"
The tobacco

Tobacco smoke contains more than 3,000 dangerous substances. It causes irritation of the eyes and respiratory tract, may cause seizures in asthmatics, cancer by active or passive smoking, etc. Hence the importance of airing if someone smokes in the room. Or better, to smoke outside. As a reminder, it is anyway forbidden to smoke in public places today.

Moisture, an indirect source of pollution

The sources of moisture are not lacking: shower, cooking, washing, drying (up to 1 kg of water vapor for laundry) toilets, human metabolism (an adult produces about 55g of water vapor per hour), water damage...

Of course, moisture is not directly polluting, but it promotes the proliferation of molds and mites. Moisture also degrades the glue on particle board, which releases formaldehyde.

Outside air: another type of pollution

Outside air also includes pollutants, but is different in nature from indoor air. A double-flow ventilation makes it possible to filter the air entering the housing and therefore the dust. If the outside air is often of better quality, pay attention to pollution peaks (ATMO index 6 or higher). It remains to ventilate an enclosed space is essential to stir air and evacuate indoor pollutants.

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مواضيع بالعربية و الانجليزية topics

2016