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Air Quality. a brief introduction. Definition of Air Quality. Attributes of the atmosphere that make it able to sustain life. What is the atmosphere?. The gaseous envelope surrounding Earth 78% nitrogen (N 2 ) 21% oxygen (O 2 ) Air is the mixture of gases in the atmosphere

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air quality

Air Quality

a brief introduction

definition of air quality

Definition of Air Quality

Attributes of the atmosphere that make it able to sustain life

what is the atmosphere
What is the atmosphere?
  • The gaseous envelope surrounding Earth
    • 78% nitrogen (N2)
    • 21% oxygen (O2)
  • Air is the mixture of gases in the atmosphere
  • Adding gases changes the composition of the atmosphere
goals of air quality research
Goals of Air Quality Research
  • Understand
  • Control
  • Manage
poor air quality problems
Poor Air Quality Problems
  • Urban Smog
    • poor visibility, human health problems and death
  • Acid Rain
    • forest and crop depletion, deterioration of buildings, destruction of lakes and rivers
  • Stratospheric Ozone Depletion
    • increased exposure to UV rays
  • Global Climate Change
    • changes in weather patterns
correlated health effects
Correlated Health Effects
  • Respiratory disease
    • Asthma
    • Pulmonary emphysema
    • Chronic bronchitis
    • Lung cancer
    • Infections
  • Eye irritation
  • Indirect cardiovascular disease
regulation of air quality
Regulation of Air Quality
  • Clean Air Act (CAA) and Amendments were created to reduce smog and atmospheric pollution
    • Uniform National Ambient Air Quality Standards (NAAQS) for 6 criteria pollutants
    • Hazardous air pollutant (HAP) regulations based on control technologies
    • Standards for the control of motor vehicle emissions
criteria pollutants
Criteria Pollutants
  • Ozone (O3)
  • Carbon monoxide (CO)
  • Nitrogen dioxide (NO2)
  • Sulfur dioxide (SO2)
  • Particulate matter (PM-10 and PM-2.5)
  • Lead (Pb)
air monitoring networks
Air Monitoring Networks
  • Which air monitors are placed where
  • Provide a general overview of regional air quality
    • Air Quality Index (AQI)
  • Data from monitors is how the research is done
hillsborough county s air monitoring network
Hillsborough County’s Air Monitoring Network
  • Run by the Environmental Protection Commission of Hillsborough County (EPC)
  • In 2004, 52 monitors in 23 locations
  • Monitored the criteria pollutants as well as wind and some hazardous air pollutants (HAPs)
    • Carbonyls
    • Volatile organic compounds (VOCs)
    • Metals
    • Nitrate, sulfate, and ammonium
nitrogen dioxide no 2
Nitrogen Dioxide (NO2)
  • Formed from reactions within the air at the high temperatures and pressures of engines
    • nitrogen and oxygen
  • Causes health problems
  • Once in atmosphere, forms ozone and smog
ozone o 3
Ozone (O3)
  • Formed in the atmosphere by NOx and volatile organic compounds (VOCs) in the presence of sunlight
      • NOx and VOCs from vehicles
  • Major component of smog
  • Causes health problems and destruction of materials
web sites
Web Sites
  • EPC of Hillsborough County
  • Florida Air Quality
  • EPA’s Ambient Monitoring Technology Information Center (AMTIC)
  • Current Air Quality Index (AQI)