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15 -4 The Air We Breathe

15 -4 The Air We Breathe. Air Quality is determined by the amount and type of pollutants in the air. Natural sources produce a greater amount of pollutants than humans do. Human activities cause most of the air pollution in cities. This pollution may be solid, liquid, or gas.

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15 -4 The Air We Breathe

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  1. 15 -4 The Air We Breathe

  2. Air Quality is determined by the amount and type of pollutants in the air. • Natural sources produce a greater amount of pollutants than humans do.

  3. Human activities cause most of the air pollution in cities. This pollution may be solid, liquid, or gas.

  4. Types of Pollutants • Primary pollutants are put directly into the air by human or natural acitivity • Ex. (volcanic eruptions and vehicle exhaust)

  5. Types of Pollutants • Secondary pollutants form when primary pollutants react with other pollutants, water vapor, sunlight, or some other substance. • Ex. (ozone and smog)

  6. Sources of Human-Caused Air Pollution • Most air pollution comes from transportation. • Car exhaust contribute about 60% in the U.S.

  7. Industrial air pollution comes from burning fossil fuels which releases oxides into the atmosphere. • Some industries also release poisonous fumes into the air

  8. Chemicals in household cleaners, new carpets, paints, cooking smoke, and other sources, may pollute indoor air. • Some air inside buildings may be worse than the air outside.

  9. Air pollution is a local and global concern. • Winds move pollutants from one place to another.

  10. Acid precipitation is caused by oxides of sulfur and nitrogen reacting with water droplets in the atmosphere to form sulfuric acid and nitric acid.

  11. Some chemicals react with the ozone in the ozone layer to break it down which allows the sun’s harmful ultraviolet rays to reach the Earth’s surface.

  12. I Breathe What?

  13. Chemicals

  14. Exhaust

  15. Pollen

  16. Dirt

  17. Dust Storms

  18. How does dirt get in your house? • Windows • Doors • Air Conditioning • Pets • You!

  19. Facts About Breathing • You breath about 26,000 times a day (16-18 breaths per minute) • That is about 150 full bathtubs of air • We breath in over a billion small particles a day (1,000,000,000) • The average house collects about 2 pounds of dust a week

  20. How does your body filter out the particles?

  21. Mucus Dried Mucus forms when mucus traps dirt in the nose

  22. Nasal Hair Nose hairs filter most of the dirt in the air.

  23. Sneezing

  24. Coughing

  25. Air pollution has an effect on human health. Dizziness, headaches, runny nose, sore throat, and even lung cancer and other diseases are caused by pollution.

  26. The Clean Air Act gives the Environmental Protection Agency (EPA) the authority to control the amount of air pollutants that can be released by any one source.

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