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BESC 367 Exam 2 Questions and Answers
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BESC 367 Exam 2 Questions and Answers
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BESC 367 Exam 2 Questions andAnswers
Clean Air Act was created in what year? - Answer -1970
List the 6 Criteria Pollutants - Answer -1. Sulfur Dioxide
2. Nitric Oxides (NOx)
3. Carbon Monoxide
4. Tropospheric Ozone
5. Particulates
6. Lead (1976)
Sulfur Dioxide - Answer -Natural: volcano eruptions, decay of OM, sea-spray
Human: combustion of fossil fuels (over half)
Risk: respiratory damage, acid rain
Nitric Oxides - Answer -Natural: lighting strikes, organic decay
Human: motor vehicles, power plants, waste disposal, fertilizer, livestock (over half)
Risk: acid rain, smog, climate change, respiratory damage
Carbon Monoxide - Answer -Natural: mostly from natural processes
Human: fuel combustion and vehicles
Risk: mental impairment, angia, impaired vision
Troposhperic Ozone - Answer -Natrual: NOx and voc's react in presence of sunlight.
Human: hydrocarbons
Risk: smog, eye irritation, asthma
Particulates - Answer -Natural: Gas transformation, soil erosion
, Human: industry, combustion, other "dusty" activity
Risk: as particle size decreases, health risk increases, some link to heart attacks
Lead - Answer -added in 1976 by National Resource Defense council won supreme
court case against Russel Train
Human: big during motor vehicle spike in fuel
Risk: very potent to children, severe impacts
What year was the most recent Clean Air Act amendment and how many toxins are
regulated under it? - Answer -1990, 188 toxins
What were the toxic air pollutants regulated before 1990? - Answer -1. benzene:
chemical and plastic plants
2. vinyl chloride: chemical and plastic plants
3. chlorinated dioxins: burning of plastics
4. asbestos
5. beryllium
6. mercury
7. arsenic
8. radionuclides
9. coke oven emissions
How does acid rain form? - Answer -sulfur dioxide or nitrogen oxides react with sunlight
and water vapor to form acids
Acid rain usually has a pH below what? - Answer -5
What are some effects of acid rain? - Answer -soil leaching, increased erosion, harm to
aquatic ecosystems, building degradation, and public
health issues.
What is the role of stratospheric ozone? - Answer -protects us from solar radiation
How was the hole in the ozone layer created? - Answer -chlorofluorocarbons (CFCs)
that break down O3 to O2
What is aiming to reduce ozone-depleting compounds by 2050? - Answer -1987 United
Nations Montreal Protocol
Are greenhouse gases relevant to climate change? - Answer -YES
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