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Air Pollution

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Examples include volcanic ash, pollen, car exhaust, smoke. Secondary Pollutants ... Car exhaust contains nitrogen oxide which helps create smog and acid precipitation ... – PowerPoint PPT presentation

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Title: Air Pollution


1
Air Pollution
2
Air Pollution
  • Air pollution is the contamination of the
    atmosphere by the introduction of pollutants from
    human and natural sources

3
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4
Air Pollution
  • Air pollutants are classified according to their
    source
  • They can be either primary or secondary pollutants

5
Primary Pollutants
  • Pollutants that are directly put into the
    atmosphere by natural or human activity
  • Examples include volcanic ash, pollen, car
    exhaust, smoke

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Secondary Pollutants
  • Pollutants that occur when primary pollutants
    react with other pollutants or naturally
    occurring substances (ozone and smog)

8
Secondary Pollutants
  • Harmful ozone forms when sunlight reacts with car
    exhaust
  • Smog forms when car exhaust and ozone react with
    sunlight

9
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10
Sources of Artificial Pollution
  • One major source of human pollution comes from
    transportation
  • Car exhaust contains nitrogen oxide which helps
    create smog and acid precipitation

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Sources of Artificial Pollution
  • Industrial sources such as oil refineries,
    dry-cleaning businesses
  • Inside buildings, ventilation, can reduce indoor
    air pollution

13
Acid Precipitation
  • Acid precipitation is rain, sleet, or snow that
    contains a high concentration of acids
  • Mainly caused by the burning of fossil fuels

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Acid Precipitation
  • Can cause acidification, which is the increase of
    a soils acidity
  • This kills plant life by substituting toxic
    nutrients for healthy ones

16
Ozone Hole
  • A hole in the ozone layer over Antarctica was
    caused by the widespread use of CFCs
  • This hole causes more harmful UV radiation to
    reach the Earth

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Cleaning up the Air
  • In 1970, congress passed the Clean Air Act which
    controlled the amount of air pollutants put into
    the air

19
Question 1
  • What is the difference between a primary and a
    secondary pollutant?

20
Answer
  • Primary pollutants are put directly into the air,
    and secondary pollutants form when primary
    pollutants react with other substances

21
Question 2
  • How does acid precipitation form?

22
Answer
  • Acid precipitation forms when the pollution from
    industries combines with water vapor

23
Question 3
  • What is air pollution?

24
Answer
  • Air pollution is the contamination of the
    atmosphere by the introduction of pollutants from
    human and natural sources
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