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LEC02 05.27.2013.docx

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Environmental Science

LEC02 Airborne Hazards and Human Health 05.13.2013 Airborne Hazards and Human Health (no lec next week) London Smog - 1952 - still has a huge impack on how we research - land marker for air pollution - before this we had polluted ai - started with industrial revolusion (coal and soft coal) but didn’t have a huge impack on human health - london england - industrialization, winter heating - why 1952??? o London had a cold winter o the air was stag (no air movement) o the air became thick like fog - sulfur dioxide - research o two kinds of air pollution  sulfur dioxide  smoke o short event 6-7 days o up to 4000 people died (mostly the people with poor health) o it was resolved by itself  wind started to blow o the UK started intensive air cleaning  they switch from coal to cleaner sources of energy  switching to gas o london is a very clean city today Indonesian Fire - 1997 - in tropical areas it is common practice to slash and burn (cultural) - rain put out the fire in the rainy area - the rain didn’t come to put out the fire - the fire was as large as 6 american states - this event was some what out of human control - same ting happened in 1998 but in smalled dimentions Air today - besides all efferts the problem is not resolved - this is a global problem o travels over long distances o there is nothing you can do if everyone is not - the largest problem is around industrys o hamilton (dioxine) LEC02 Airborne Hazards and Human Health 05.13.2013 o toronto (July smog) Outdoor air pollution - sources o human  mobile (cars)  stationary (industry) o natural  volcanos o primary air pollutants react to create secondary air pollutants - Helath effects o Increase number in different types of Asthma  Irritate passages in breathing pathways  In childern  Indoor air (we are spending more time indoor) o Chronic Bronchitis  Excess amount of mucus is produced  SO 2  Smoking o Emphysema  Shortness of breath  Weakening of the wall of alveoli  Not being able to go up stairs  NO 2 - Partical matter o Particles found in the air o PM 10 (big) all particals smaller ing 10 micros o PM2.5 (small) all particals smaller thern 2.5 micros o Smaller particals can cause bigger harm as they can travel further in our breathing system o Released from different sources  Construction  Burning  Vehicles  Burning trash o Some formed in the air Outdoor air - Carbon Monoxide o CO o No taste small or color or smell o gas o We usually found out when it is to late o Incomplete burnng of carbon cnntain fuels  Heater stove o Cause flu or stomach sim LEC02 Airborne Hazards and Human Health 05.13.2013 o High levels  Fatigue  Headache  Weakness  Confusion  Loss of coordination  Death o High infinity for CO so it interfers with the delevory o2 O o Prevention  The best cure  Detectors - Nitrogen Oxides o NO x o Relea
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