essay on air pollution one page
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Essay on Air Pollution. ... Airwith 78% Nitrogen, 21% Oxygen, and 1% of all other gases support life on Earth. Various processes take place to sustain the regular percentage of gases and their composition in general. Atmospheric pollutioncan have natural sources, for example, volcanic eruptions
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Air Pollution
Explanation:
Why is air quality so important?
Here’s why Europe needs to tighten its legislation on threats to air quality from road vehicles, diesel machinery and sea-going ships.
How does air pollution affect us?
An adult breathes 15,000 litres of air every day. When we breathe polluted air pollutants get into our lungs; they can enter the bloodstream and be carried to our internal organs such as the brain. This can cause severe health problems such as asthma, cardiovascular diseases and even cancer and reduces the quality and number of years of life. (New evidence even suggests that every organ in the human body is harmed.) Vulnerable groups, namely children, people with chronic diseases, and the eldery, are particularly sensitive to the dangerous effects of toxic air pollution.
Polluted air also causes eutrophication and acidification of our ecosystems, which results in the loss of agricultural productivity, irreversible damage to ecosystems and the loss of biodiversity. Last but not least, air pollution causes severe damage to our cultural heritage by degrading architectural masterpieces that are part of our national and European identity.
Air pollution, release into the atmosphere of various gases, finely divided solids, or finely dispersed liquid aerosols at rates that exceed the natural capacity of the environment to dissipate and dilute or absorb them. These substances may reach concentrations in the air that cause undesirable health, economic, or aesthetic effects.
Major Air Pollutants
Criteria pollutants
Clean, dry air consists primarily of nitrogen and oxygen—78 percent and 21 percent respectively, by volume. The remaining 1 percent is a mixture of other gases, mostly argon (0.9 percent), along with trace (very small) amounts of carbon dioxide, methane, hydrogen, helium, and more. Water vapour is also a normal, though quite variable, component of the atmosphere, normally ranging from 0.01 to 4 percent by volume; under very humid conditions the moisture content of air may be as high as 5 percent.
The particulates of most concern with regard to their effects on human health are solids less than 10 μm in diameter, because they can be inhaled deep into the lungs and become trapped in the lower respiratory system. Certain particulates, such as asbestos fibres, are known carcinogens (cancer-causing agents), and many carbonaceous particulates—e.g., soot—are suspected of being carcinogenic. Major sources of particulate emissions include fossil-fuel power plants, manufacturing processes, fossil-fuel residential heating systems, and gasoline-powered vehicles.Fine particulates
Very small fragments of solid materials or liquid droplets suspended in air are called particulates. Except for airborne lead, which is treated as a separate category, they are characterized on the basis of size and phase (i.e., solid or liquid) rather than by chemical composition. For example, solid particulates between roughly 1 and 100 μm in diameter are called dust particles, whereas airborne solids less than 1 μm in diameter are called fumes.Except for lead, criteria pollutants are emitted in industrialized countries at very high rates, typically measured in millions of tons per year. All except ozone are discharged directly into the atmosphere from a wide variety of sources. They are regulated primarily by establishing ambient air quality standards, which are maximum acceptable concentrations of each criteria pollutant in the atmosphere, regardless of its origin. The six criteria pollutants are described in turn below.particularly toxic and are an important pollutant of many diesel fuels.
Some air pollutants are poisonous. Inhaling them can increase the chance you'll have health problems. People with heart or lung disease, older adults and children are at greater risk from air pollution. Air pollution isn't just outside - the air inside buildings can also be polluted and affect your health.