Unit 5 ch 12 s2 air, noise, and light pollution


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Unit 5 ch 12 s2 air, noise, and light pollution

  1. 1. AIR & AIR POLLUTION Chapter 12, Section 2: Air, Noise & Light Pollution Standards: SEV3a
  2. 2. WHO IS MOST AFFECTED BY AIR POLLUTION?  Very young  Very old  People with heart or lung problems  People who have asthma
  3. 3. WHAT ARE THE SHORT TERM EFFECTS OF AIR POLLUTION ON HEALTH?  Headache  Nausea  Irritation of eyes, nose, throat  Coughing  Upper respiratory infections- bronchitis, pneumonia  Worsen effects of asthma & emphysema
  4. 4. WHAT ARE THE LONG TERM EFFECTS OF AIR POLLUTION?  Emphysema  Lung cancer  Heart disease
  5. 5. CASE STUDY: HEALTH EFFECTS OF GROUND LEVEL OZONE (AKA- BAD OZONE)  Good ozone is in the stratosphere over Earth’s atmosphere & protects us from UV rays  Ground Level (bad) Ozone = VOC’s + NOx + sunlight  Mostly from cars, gas vapors & power plants  Short term effects: irritation of respiratory system, increased asthma  Long term effects: reduced lung function (especially kids who live in urban areas and are outside often)
  6. 6. WHAT ARE SOME TYPES OF INDOOR AIR POLLUTION?  Sometimes indoor worse than outdoor because more concentrated & more exposure.  Tobacco smoke  Tetrachloroethylene- dry cleaning fluid  Paradichlorobenzene- moth balls & air freshener  Bleach, NaOH- cleaners  NOx- unvented gas stoves, wood stoves  Fungi & bacteria- dirty air conditioning ducts  CO- faulty furnace, cars left running  Formaldehyde- furniture, carpet, particle board  Radon- radioactive soil under foundation
  7. 7. WHAT IS RADON?  Odorless,colorless  Radioactive  When home is built, radon can be “uprooted”  If basement or floors develop cracks, radon can seep in  If you live in this environment for many years can develop lung cancer.  2nd leading cause of lung cancer in US  How do you fix it?  Establish ventilation system in basement to release radon so it doesn’t build up in house
  8. 8. WHAT IS ASBESTOS?  Long, thin fibers that are able to resist heat  Insulator, fire retardant  Brakes & building materials  Banned in school buildings now.  Inhaling asbestos can cut & scar lungs  Leads to type of lung cancer called mesothelioma Cross section of a lung afflicted with mesothelioma
  9. 9. WHAT IS SICK BUILDING SYNDROME?  Common in well air conditioned buildings that are closed tight to keep in cool air.  Cause headaches, nausea that are alleviated by going outside  Martin county, Florida- $11 million courthouse closed down due to mold created by air conditioning system with no ventilation.  LA Times- Florida's Plague: Sick Building Syndrome
  10. 10. WHAT IS NOISE POLLUTION?  Unwanted sounds  Irritating to ears & damages cells in ears  Hearing loss has doubled in US in last 30 yrs  12% teens have permanent hearing loss  Measured in decibels (dB)  See table  120 dB is threshold of pain  Europe MP3 players cannot produce more than 100 dB of noise  National Institute of Health sets safe threshold at 85dB for 8 hours  US does not regulate personal listening devices.
  11. 11. WHAT IS LIGHT POLLUTION?  Does not present direct danger to human health.  Problems with light pollution:  Aesthetic reasons- can’t see stars at night  Wasted energy when shines upward  Shield light so it is focused downward  Use timer controls  Use low pressure sodium light sources to save energy
  12. 12. YOU SHOULD BE ABLE TO…  Describe the long term and short term effects of air pollution on health.  Describe two ways in which indoor air pollution can be prevented  Describe some of the human health problems caused by noise pollution  Describe several solutions to the energy waste associated with light pollution.