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Air Issues
 

Air Issues

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    Air Issues Air Issues Presentation Transcript

    • Air & Energy Issues
      Monday December 13th
    • Air Issues
      The Atmosphere
      The Grasshopper Effect
      Acidic Deposition
      Ozone Layer
    • The Atmosphere
      Comprised of a mixture of particles, aerosols and gases
      Approximately 1000 km thick
      Sustains life on the planet
      Protects us from Ultra Violet Radiation (UV) from the sun
    • The Atmosphere
      Green house Gases- carbon dioxide, methane, nitrous oxide, and ozone. Represent a small portion of the atmosphere but regulate temperature.
      The layer of the atmosphere we are most concerned with is the Troposphere:
      Varied thickness from 9-16 km above the earths surface
      Where weather occurs and pollution is found
    • The Atmosphere
    • The Atmosphere
      Human activities have a profound effect on the atmosphere since the time of the Industrial Revolution in the early 1900’s
      Air pollution also has a large impact on peoples health (especially young children, the elderly, those with heart and respiratory conditions)
      Environment Canada attributes over 5000 deaths/ year to air pollution
      An estimated $1 billion/year are spend on hospitaladmissions, emergency room visits and absenteeism is due to air pollution (Ontario Medical Assoc., 2007)
    • The Grasshopper Effect
      Persistent Organic Pollutants (POPs)- highly toxic substances used in pesticides and industrials chemicals (i.e. PCB’s). They are insoluble by water, and stay within the environment for many years before breaking down.
    • The Grasshopper Effect
      A global issue in which POPs move from warmer to colder regions.
      The pollutants evaporate, travel through the atmosphere (on air currents), and then condense in a new location.
      Tend to stay in colder regions because there is less evaporation in those areas.
    • The Grasshopper Effect
      Less Evaporation
      Colder
      Polar Regions
      Temperate Regions
      More Evaporation
      Hotter
      Equatorial Regions
    • Air Issues
      Acidic Deposition
      Acidic pollutants can be deposited as a gas or a dust, or can be carried for thousands of Km’s to be deposited as acidic rain, snow, fog or hail
    • Air Issues
      Acid Rain (pg 288)
    • Air Issues
      Acidic Deposition
      95,000 of the 700,000 lakes in South Eastern Canada are already classified as “acidic”
      Estimates by environment Canada (2009) state that half of the acidic precipitation in eastern Canada comes from U.S. industries
      The U.S. on the other hand claims that it receives 88% of their pollution (in the eastern US) from the Nantocoke generating station near Toronto.
    • The Ozone Layer
      Forms the stratosphere and protects us from the suns UV Radiation
      Human activities are upsetting the balance of this gas
      In 1983 it was confirmed that there was a whole in ozone (over Antarctica)
      In 1998 the hole measured 26 million Km’s (roughly the size of Australia)
      How is it being destroyed?
      Chloroflouorocarbons (CFCs)- once they rise into the stratosphere, they become exposed to UV radiation and release chlorine atoms
      A single chlorine atom can destroy thousands of molecules of ozone
    • Copy to your notes:
      Acidic Deposition Diagram pg 288
      Effects of Acidic Deposition Chart pg 290
      Effects of UV Radiation pg 294
      What is the Montreal Protocol?