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AIR POLLUTION: CAUSES AND
CONSEQUENCES
BY ABHISHEK NIRMAL
11414802712
CSE
A-8
What is pollution?
• Pollution can be defined as any undesirable
change in the composition of air , water and
soil or any segment of environment against
nature.
• Pollution can be classified as:
– Water Pollution
– Air Pollution
– Land Pollution
Air Pollution
It can be defined as the presence of chemicals in the
atmosphere and duration that are harmful to
human health and the environment.
Causes of Air Pollution
• One of the main causes of air pollution is the
release of carbon dioxide into the atmosphere,
this happens because of Deforestation and fossil
fuel burning.
• Sulfur dioxide is another air polluter and is
released into the atmosphere by the burning of
sulfur containing compounds of fossil fuels. Sulfur
oxides are very dangerous to humans at a high
concentration. Sulfur in the atmosphere is
responsible for acid rain
More causes of air pollution: CFCs
• Chlorofluorocarbons (CFCs) also contribute to
air pollution by reducing the amount of ozone
the stratosphere. CFCs come from a variety of
places such as:
– the burning of plastic foam items
– leaking refrigerator equipment
– spray cans
Natural Air Pollutants
• Pollutants : The undesirable component in the
atmosphere causing pollution is referred to as
pollutants.
• Natural air pollutants can include:
– Smoke from wild fires
– Methane released from live stock
– Volcanic eruptions
Consequences of Air Pollution
• CO2 is a good transmitter of sunlight, but it also
partially restricts infrared radiation going back
from the earth into space, which produces the
so-called greenhouse effect that prevents a
drastic cooling of the Earth during the night
• Increasing the amount of CO2 in the atmosphere
reinforces this effect and is expected to result in
a warming of the Earth's surface
• CO2 in atmosphereGLOBAL WARMING
The Greenhouse Effect
Acid Rain
• When emissions of sulfur dioxide and nitric oxide
from stationary sources are transported long
distances by winds, they form secondary
pollutants such as nitrogen dioxide, nitric acid
vapor, and droplets containing solutions of
sulfuric acid, sulfate, and nitrate salts
• These chemicals descend to the earth's surface in
wet form as rain or snow and in dry form as a
gases fog, dew, or solid particles, it is known as
acid rain or acid deposition
Acid Rain: Its effect on a tree
Smog
• ‘Smog’ is the combination of two words ,
‘Smoke’ and ‘Fog’.
• With the introduction of petroleum to replace
coal economies in countries, photochemical
smog has become predominant in many cities,
which are located in sunny, warm, and dry
climates with many motor vehicles
• Worst episodes of photochemical smog tends
to occur in summer
A smoggy city
Consequences continued
• Sulfur dioxide, nitrogen oxides, ozone and
peroxyacl nitrates (PANs), cause direct
damage to leaves of crop plants and trees
when they enter leaf pores (stomates)
• Chronic exposure of leaves and needles to air
pollutants can also break down the waxy
coating that helps prevent excessive water
loss and damage from diseases, pests, drought
and frost
Consequences continued
• "In the midwestern United States crop losses
of wheat, corn, soybeans, and peanuts from
damage by ozone and acid deposition amount
to about $5 billion a year". (Miller 498)
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Environmental
Laws
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Air Pollution

  • 1. AIR POLLUTION: CAUSES AND CONSEQUENCES BY ABHISHEK NIRMAL 11414802712 CSE A-8
  • 2. What is pollution? • Pollution can be defined as any undesirable change in the composition of air , water and soil or any segment of environment against nature. • Pollution can be classified as: – Water Pollution – Air Pollution – Land Pollution
  • 3. Air Pollution It can be defined as the presence of chemicals in the atmosphere and duration that are harmful to human health and the environment.
  • 4. Causes of Air Pollution • One of the main causes of air pollution is the release of carbon dioxide into the atmosphere, this happens because of Deforestation and fossil fuel burning. • Sulfur dioxide is another air polluter and is released into the atmosphere by the burning of sulfur containing compounds of fossil fuels. Sulfur oxides are very dangerous to humans at a high concentration. Sulfur in the atmosphere is responsible for acid rain
  • 5. More causes of air pollution: CFCs • Chlorofluorocarbons (CFCs) also contribute to air pollution by reducing the amount of ozone the stratosphere. CFCs come from a variety of places such as: – the burning of plastic foam items – leaking refrigerator equipment – spray cans
  • 6. Natural Air Pollutants • Pollutants : The undesirable component in the atmosphere causing pollution is referred to as pollutants. • Natural air pollutants can include: – Smoke from wild fires – Methane released from live stock – Volcanic eruptions
  • 7. Consequences of Air Pollution • CO2 is a good transmitter of sunlight, but it also partially restricts infrared radiation going back from the earth into space, which produces the so-called greenhouse effect that prevents a drastic cooling of the Earth during the night • Increasing the amount of CO2 in the atmosphere reinforces this effect and is expected to result in a warming of the Earth's surface • CO2 in atmosphereGLOBAL WARMING
  • 9. Acid Rain • When emissions of sulfur dioxide and nitric oxide from stationary sources are transported long distances by winds, they form secondary pollutants such as nitrogen dioxide, nitric acid vapor, and droplets containing solutions of sulfuric acid, sulfate, and nitrate salts • These chemicals descend to the earth's surface in wet form as rain or snow and in dry form as a gases fog, dew, or solid particles, it is known as acid rain or acid deposition
  • 10. Acid Rain: Its effect on a tree
  • 11. Smog • ‘Smog’ is the combination of two words , ‘Smoke’ and ‘Fog’. • With the introduction of petroleum to replace coal economies in countries, photochemical smog has become predominant in many cities, which are located in sunny, warm, and dry climates with many motor vehicles • Worst episodes of photochemical smog tends to occur in summer
  • 13. Consequences continued • Sulfur dioxide, nitrogen oxides, ozone and peroxyacl nitrates (PANs), cause direct damage to leaves of crop plants and trees when they enter leaf pores (stomates) • Chronic exposure of leaves and needles to air pollutants can also break down the waxy coating that helps prevent excessive water loss and damage from diseases, pests, drought and frost
  • 14. Consequences continued • "In the midwestern United States crop losses of wheat, corn, soybeans, and peanuts from damage by ozone and acid deposition amount to about $5 billion a year". (Miller 498)