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BYU-I - HS 310 - Study Guide - Midterm

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BYU-I - HS 310 - Study Guide - Midterm

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background image Lesson 7 Air Pollution Study Guide Three natural causes of air pollution: Forest fires, volcanic eruptions, wind 
erosion, pollen dispersal, evaporation of organic compounds and natural 
radioactivity, drought. 
Three manmade causes of air pollution: Burning of fossil fuels such as 
gasoline and coal; waste incineration, and industrial and agricultural 
processes. 
There are six regulated criteria pollutants here in the U.S.: 1. Ground Level Ozone: 3 atoms of Oxygen. Not emitted directly into  the air, but is created by chemical reactions between oxides of 
Nitrogen (NO
x ) and volatile organic compounds (VOC) in the presence  of sunlight. Emission from industrial facilities and electric utilities, 
motor vehicle exhaust, gasoline vapors and chemical solvents. Can 
trigger breathing problems. Can harm sensitive vegetation and 
ecosystem. 
2. Particulate Matter: Fine particle haze. Mixture of solid particles and  liquid droplets such as dirt, dust, soot or smoke. PM 10 : inhalants  particles 10 mm or smaller. PM 2.5:  particles 2.5 mm and smaller. Made  up of 100s of different chemicals that form as a result of complex 
reactions. Particles less than 10 mm in diameter are the worst and can 
settle deep in the lungs or enter the blood stream. 
3. Carbon Monoxide: Cars, trucks and other vehicles or machinery that  burn fossil fuels. Colorless, odorless gas harmful when inhaled in large 
amounts and can cause dizziness, confusion, unconsciousness and 
even death. CO is released when something is burned. Unvented 
kerosene, gas space heaters, leaking chimney and furnaces and gas 
stoves affect indoor air quality. CO reduces the amount of O2 in the 
blood. 
4. Lead: Ore and metals processing and piston-engine aircraft using  leaded fuel. Waste incinerators, utilities and lead-acid battery 
manufactures. High concentrations found near lead smelters. Lead 
gets in the blood and then is absorbed by the bones. Affects nervous 
system, kidney function, reproduction, immune system and 
cardiovascular system. Lead decreases the growth of living matter in 
the water. Lead has been reduced by 98% from 1980 to 2014. 
5. Sulfur Dioxide: (SO 2 ) Made by burning either sulfur or sulfur  containing materials. Greatest concern is fossil fuels combustion and 
power plants and other industrial facilities. Smaller causes: extracting 

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School: Brigham Young University - Idaho
Department: OTHER
Course: Environmental Health
Term: Fall 2017
Tags: Pollution, catalytic, and converters
Name: HS310 Lesson 7 Pollution
Description: Causes of pollution, six regulated criteria pollutants in the US and the importance of catalytic converters.
Uploaded: 02/22/2018
2 Pages 45 Views 36 Unlocks
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