Airborne Hazards

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University of Toronto Scarborough
Environmental Science
Chris Bovaird

Airborne Hazards Lecture 2 Caste study 1: London smog, 1952  The smog was the result of coal burning  Since the industrial revolution, the amounts of gases were tremendously high and environment was damaged severely.  One of the first big events was the event called London smog in December. It lasted 5-7 days. Fogs forming, moist air, not a cold climate.  People choked because of sulfur dioxide creating sulphric acid  Industry contributed , and was what released that  Nothing could be done, waited for weather to change, and resolve itself  About 4000 people died due to effect of sulphric acid.  It was the landmark. Brithish government realizd something has to be done, and implemented british queen act. One of the first legislations in the world  Situations all around the world improved during this period Case study 2: Indonesian fires, 1997  Very common practice in the tropical forests  Tress are being burnt with initiated fire (controlled fire)  It is burnt to clear the land, later in use for agriculture for crops  People lost control over the fire. Area that was burnt was extremely large  In 1998, similar event happened again Airborne Hazards  Outdoor air pollution:  Indoor air pollution: Sources of outdoor air pollution  Volcanoes, vegetation, natural sources  These gases have been dispersed  Stationary industries  Movable (transportation) ex. Vehicles  All belong to stationary  From all these sources, numbers of gases are released. First primary gases are released Health effects of Outdoor Air Pollution  Asthma is the illness that may find us reasons of outdoor pollution Ex. Allergic reasons, etc  What Is Asthma? Difficulty breathing  Get irreated due to suplhric dioxide.  Indoor air pollution can also contribute to this  Chronic bronchitis: children are vulnerable population  Smoking could be a cause  Causes strong, long coughs  Pulmonary emphysema  Lungs get large, shortness of breath (primary symptom)  Nitro gases related to this  What other
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