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INTRODUCTION

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…

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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…

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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…

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EFFECTS ON HUMANS

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
pollutants
Respiratory problems: Shortness of breath, wheezing, bronchitis, pneumonia,…

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HOW CAN WE REDUCE THE EFFECTS OF AIR POLLUTION?

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…

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