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Pollution

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Pollution Water and Air Water Water Pollution Water Issues Problems with our water supply What is Air Pollution? Acid Rain – PowerPoint PPT presentation

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Title: Pollution


1
Pollution
  • Water and Air

2
Water
  • Water is a renewable resource
  • Salt Water 97
  • Oceans, seas
  • Fresh Water 3
  • Lakes, streams, ponds, underground (aquifers)

3
  • Shortage of fresh water is a huge environmental
    problem
  • WHO states that 1 billion people world wide lack
    access to clean water

4
  • Global Use
  • Residential
  • Agriculture
  • Industrial
  • Most fresh water is used for irrigation

5
  • Residential
  • In the US the ave. person uses 300 L (80 G) / day
  • India only uses 41 L

6
  • Daily usage/person
  • Lawns 95L
  • Toilet 90L
  • Baths 70L
  • Brush Teeth 10L
  • Cleaning 20L
  • Cooking 10L
  • Other 5L

7
  • Water Conservation
  • Agriculture is beginning to use different types
    of irrigation (drip)
  • Industry is recycling water used
  • Home
  • How can you conserve water usage at home????

8
Water Pollution
  • Introduction of chemical, physical, or biological
    agents into water that degrades quality
  • Main causes industrialization and population
    growth

9
  • Sources
  • Point-Source Pollution
  • Discharge from a single source
  • Septic tanks, leaky storage lagoons, unlined
    landfills, leaky underground chemical storage
    tanks, abandoned mine water, discharge from
    treatment plants

10
  • Non point pollution
  • Many different sources
  • Road chemicals (salt, etc), streets (gas,
    antifreeze), pesticides, herbicides, refrigerator
    and air conditioner coolants, livestock feed
    yards, acid rain, construction sites, oil/ gas
    from boats

11
  • Pollutant Types
  • Pathogens
  • Organics
  • Inorganics
  • Heavy metals
  • Physical agents

12
Water Issues
  • Waste Water
  • Water is treated enough to release it back into
    lakes and streams
  • Sludge is usually burned

13
Problems with our water supply
  • Artificial Eutrophication
  • Caused by extra nutrients being added to bodies
    of water

14
  • Thermal Pollution
  • Temperature of body of water increases
  • Reduces levels of dissolved Oxygen so fish will
    die

15
  • Groundwater Pollution
  • Percolates from surface
  • Can come from underground storage tanks
  • Hard to clean up because recharge is slow

16
  • Ocean pollution
  • Oils spills
  • Cruise ships
  • 7 billion kg of garbage is dumped every year!
  • 85 of ocean pollutions comes from activities on
    land (oils, pesticides, fertilizers)

17
What is Air Pollution?
  • When harmful substances build up in the air to
    unhealthy levels
  • Most comes from human activities but some can
    come from natural events

18
  • Primary Pollutants
  • Directly put into the air (soot)
  • CO, NO, SO2, VOCs (volatile organic compounds),
    particulate matter

19
  • Secondary Pollutants
  • When primary pollutants comes into contact with
    other primary pollutants or natural substances
  • Ground level ozone

20
  • Motor vehicle emissions
  • 1/3 of all air pollution comes from emissions
    from cars

21
  • Industrial Air Pollution
  • Burning fossil fuels
  • Releases SO2, NO into the air
  • Power plants produce 2/3 of all SO2 released

22
  • Smog
  • Air pollution over urban areas caused by
    sunlight, air, auto exhaust, and ozone
  • Traps pollutants

23
  • Short term Effects of Air Pollution on Health
  • Headaches, nausea, irritation to the nose and
    throat, tight chest, respiratory infections

24
  • Long Term Effects
  • Emphysema
  • Lung cancer
  • Heart disease

25
  • In Door Air Pollution
  • Plastics, industrial chemicals, CO, fungi,
    bacteria, tobacco smoke, formaldehyde
  • Sick building syndrome caused when buildings
    have poor air supply

26
  • Radon gas
  • Colorless, odorless, tasteless gas
  • Causes cancer (2nd lead cause)

27
  • Asbestos
  • Thin fibers that can get into your lungs and
    cause cuts and scaring which can lead to
    infections
  • Found in insulation and other building materials
  • Banned since 1970

28
Acid Rain
  • Causes
  • Precipitation that contains high concentration of
    acid
  • From burning of fossil fuels
  • SO NO water
  • acid rain

29
  • Flows to into water ways and kills wildlife and
    plants

30
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31
  • Affects on Soil and Plants
  • Acidification changes the soil chemistry
  • Damages roots
  • Stomata are clogged

32
  • Causes Al and other toxic metals to be released
  • Root damage
  • SO clogs stomata (holes) on plants

33
  • Affects on Aquatic Ecosystems
  • pH goes up so plants die then everything that
    eats the plants including animals

34
  • Al accumulates in fish and they suffocates
  • Interferes with oxygen intake

35
  • Acid Precipitation and Humans
  • Rain gets into the soil, then the crops, animals
    eat the crops (or we do), then we eat those
    animals

36
  • Has been linked to respiratory problems
  • Affects quality of life by affecting the
    ecosystems we enjoy for recreation
  • Dissolves limestone in buildings and monuments

37
  • International
  • Does pollution from other countries effect us
    here in the US?

38
  • What can you do to protect our air?
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