Air pollution and global change

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  • 1. Air Pollution andGlobal ChangePay close attention to each slide.Click on the speaker on each slide for additional information.
  • 2. What is Air Pollution Air is a mixture of many gases including: Nitrogen,Oxygen, Carbon Dioxide, Water Vapor and traceother gases. Any change in the atmosphere that has harmfuleffects is called air pollution Any substance that causes pollution is called apollutant
  • 3. Composition of the AirFrom the pie chart you can seeNitrogen actually makes up thegreatest percentage of gas in theair…most would think it wouldbe oxygen because that is whatwe breathe.Image:http://id.wikipedia.org/wiki/Berkas:Air_composition_pie_chart.JPG
  • 4. How does pollution makeit into the Air? Solid particles and gasesthat are released intothe air are calledemissions Main cause of emissionsis by motor vehiclesreleasing carbonmonoxide into the airImage: Epa.gov
  • 5. Smoke + Fog = Smog When certain gases in the air react with sunlight itcan create a think brownish haze calledphotochemical smog When the smog level is high it can settle over a citycreating a dirty haze Potential threats to humans are breathing trouble,throat irritation and burning eyes Major sources of smog are the gases emitted byvehicles
  • 6. Smog continued…Images ofBeijing, Chinaon a clear sunnyday and thencovered in Smog(August 2005Smog over Los AngelesImages: http://www.earthlyissues.com
  • 7. Acid Rain Acid rain is another type of air pollution It is caused by power plants and factories that burncoal and oil and release chemicals into the air These gases react with water vapor in theatmosphere forming acids which return to Earth’ssurface in the form of precipitation Acid rain affects many things in the environmentincluding: fish, plants, buildings, statues, etc…
  • 8. Acid rain Continued…Here you can see the effects of acid rain trees and limestoneImages: USGS.gov
  • 9. Not all pollution is outside The air inside buildings can be polluted too= indoor airpollution Dust, pet hair, air fresheners, smoke and toxic fumesfrom cleaning supplies can all contribute to air pollution Carbon Monoxide (CO) is an indoor air pollutant that isa colorless and odorless gas that forms when wood, coal,oil or gas is not completely burned Radon is another colorless and odorless gas formednaturally by certain rocks underground that isradioactive.
  • 10. Common Types of IndoorAir PollutionImage:http://www.epa.gov/eogapti1/course422/ap4.html
  • 11. Human Impact onEnvironment Humans are the leading factor in creating airpollution and other hazardous wastes on earth Humans contribute to deforestation (cutting downtrees which produce oxygen) Humans also effect the natural process on earthcalled The Greenhouse effect Hazardous waste is any material that can beharmful to human health or the environment if notproperly disposed of
  • 12. Greenhouse Effect Greenhouse gases trap heat in the air which aids inkeep the earth a suitable temperature for us tosurvive Humans add greenhouse gases to the atmospherethrough everyday activities including driving andburning fossil fuels The more greenhouse gases that are trapped in theatmosphere the more likely it is for our overalltemperature of earth to increase (global warming)
  • 13. The Greenhouse Effect Image: http://www.nps.gov/goga/naturescience/climate-change-causes.htm
  • 14. 5 Categories of HazardousWaste1. Toxic waste= or poisonous wastes are wastes that candamage health of humans or other organisms2. Explosive wastes= wastes that react very quickly whenexposed to the air or water or that explode when theyare dropped3. Flammable wastes= catch fire easily and can beginburning at fairly low temperatures4. Corrosive wastes= wastes that dissolve or eat throughmany materials5. Radioactive wastes= contain unstable atoms that giveoff radiation that can cause cancer and other diseases
  • 15. Health Effects ofHazardous Wastes Short term exposure to hazardous wastes may causeirritation to certain body parts or more severe healthproblems Long term exposure may cause diseases such ascancer and may damage body organs including: thebrain, liver, kidneys and lungs
  • 16. Getting Rid ofHazardous Wastes Methods of hazardous waste disposal include burial inlandfills, incineration and breakdown by living organisms Liquid wastes can be stored in deep rock layers Most often Hazardous wastes are disposed in carefullydesigned landfills These landfills are lined with clay and plastic to keepchemicals from seeping into the soil and groundwater (whichcould cause serious contamination and health problems) The best way to manage hazardous waste is to produce less ofthem and educate consumers on finding substitutes forcommon household chemicals
  • 17. Disposing of HazardousMaterials ProperlyImage: Epa.gov