Air pollution (presentation based)

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  • Created on: 11-11-12 15:27
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The atmosphere is the gaseous envelope that surrounds the earth and constitutes the
transition between its surface and the vacuum of space.
The atmosphere is composed primarily of nitrogen and oxygen and is made up of many
layers of air, each one identified by their thermal characteristics or temperature
changes, chemical composition, movement and density. Life on earth is supported by
this atmosphere, solar energy, and our planet's magnetic fields.
Percentage of the atmosphere made up of:
Nitrogen ­ 78%
Oxygen ­ 21%
Other gases ­ 1%
Air pollution is the introduction of chemicals, particulate matter, or biological materials
that cause harm or discomfort to humans, other living organisms and the environment,
into the atmosphere.

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Particulate matter
Very small particles of soot, dust, or other matter, including tiny droplets of liquids.
Mainly hydrocarbons.
Released from diesel engines, power plants, industries, windblown dust, wooden
stoves etc.
Sulfur dioxide
It is a colourless gas that dissolves in water vapor to form acid, and interacts with
other gases and particles in the air.…read more

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A bluegray metal that is very toxic
From cars in areas where unleaded gasoline is not used, power plants, metal
refineries, lead smelters, battery manufacturers, iron and steel producers, lead paint
(especially in houses where paint is peeling) and old pipes.
Stratospheric ozone depleters
Chemicals that can destroy the ozone in the stratosphere. These chemicals include
chlorofluorocarbons (CFCs), halons, and other compounds that include chlorine or
Air conditioners, refrigerators, aerosol cans and fire extinguishers all release these
pollutants into the atmosphere.…read more

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Irritation to eyes, nose and throat ­ sulfur dioxide, ozone, particulate matter and
toxic air pollutants.
Headaches, reduced mental alertness, less haemoglobin in blood, nausea, impaired
fetal development and allergic reactions ­ carbon monoxide, lead and toxic air
Respiratory problems: Shortness of breath, wheezing, bronchitis, pneumonia,
asthma, emphysema nitrogen oxides, particulate matter, sulfur dioxide, ozone and
toxic air pollutants.…read more

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Reducing effects on humans:
Wearing a facemask in areas of high air pollution to prevent breathing in of
harmful pollutants
Children with asthma who supplement with antioxidant vitamins C and E are less
likely to experience breathing problems triggered by air pollution according to
Eliminate other health risk factors to counteract the damaging effects of air
pollution to the body
Reducing effects on the environment:
Using catalytic converters in car exhaust systems to remove carbon…read more


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