Air Pollution Basics Flashcards

1
Q

What air pollutants does coal combustion cause?

A

Coal combustion releases air pollutants including carbon dioxide, sulfur dioxide, toxic metals and particulates

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2
Q

What air pollutants does the burning of fossil fuels cause?

A
  • nitrogen oxides into the atmosphere

- combustion include carbon monoxide, hydrocarbons, and particulate matter

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3
Q

How is air quality affected by the burning of diesel fuels?

A

Air quality can be affected through the release of nitrogen dioxide, particulate matter, and carbon dioxide/monoxide during the burning of fossil fuels, mainly diesel fuels

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4
Q

Clean Air Act

A

The Environmental Protection Agency (EPA) regulated the use of lead, particularly in fuels, which dramatically decreased the amount of lead in the atmosphere

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5
Q

Primary Air Pollutants (and examples)

A

Immediately and directly released into the atmopshere

  • Pollen
  • Volcanic Ash
  • VOCs that are given off by plants
  • Anthropogenic (products of combustion of fossil fuels: Carbon Dioxide, Nitrogen (any number)oxide, Sulfur Dioxide)
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6
Q

Secondary Pollutants

A
  • Form once they are in the atmosphere, usually combined with water vapor, UV, or other atmospheric gases
  • Tropospheric Ozone
  • Acid rain
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7
Q

What are the 6 criteria air pollutants deemed most harmful to human health by the EPA?

A
  • Sulfur Dioxide (SO2)
  • Particulate Matter (PM)
  • Lead (Pb)
  • Ozone (O3)
  • Nitrogen Dioxide (NO2)
  • Carbon Monoxide (CO)
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8
Q

How does combusting fossil fuel affect carbon cycle?

A
  • All fossil fuels contain carbon and hydrogen
  • Combustion of carbon creates carbon dioxide
  • This carbon has not been in the atmosphere for millions of years (ancient), thus having a huge impact on the carbon cycle and is a greenhouse gas so it traps heat and causes global warming
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9
Q

What are the metal impurities in coal that are released during combustion? What do these released elements cause in terms of human health and the environment?

A
  • Toxic Metals: lead, mercury (can get in waterways, biomagnification in the aquatic food chain, becomes a severe problem), nickel, arsenic (poison)
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10
Q

How do coal-burning power plants try to reduce the amount of sulfur dioxide emissions?

A
  • Coal-burning power plants can use filters and clean coal processing (cleans coal before use of sulfur) to decrease sulfur dioxide emissions using air scrubbers
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11
Q

What are some natural emitters of pollutants?

A
  • volcanoes
  • lightning
  • forest fires
  • plants, both living & dead
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12
Q

Volatile organic compound (VOC)

A

An organic compound that evaporates (vaporizes) at typical atmospheric temperatures

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13
Q

Where is lead found? What effects does lead have on human health?

A
Children:
- Anemia
- Behavioral disorders
- Lowered IQ
- Reading & learning disabilities
- Nerve damage
Adults:
- Hypertension
- Cardiovascular disease
A gasoline additive and is also found in oil, coal, & old paint
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14
Q

What specific measures were taken to combat lead?

A
  • Lead stopped being used in gasoline
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15
Q

How is carbon monoxide released into the atmosphere and what dangers does it pose? Carbon dioxide?

A
  • CO is a common emission in vehicle exhaust & most other combustion processes
  • Dangerous in homes: if there is a natural gas leak from a fireplace or stove
  • CO2, is released from fossil fuels primarily and seem to be increasing every year
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16
Q

Where is sulfur dioxide present/how is it released (both natural and anthropogenic)? What are the health risks?

A
  • Released in large quantities during volcanic explosions and lesser quantities during forest fires
  • Coal-burning power plants
  • Diesel fuel combustion
    EFFECTS:
  • A respiratory irritant & can adversely affect plant tissue.
  • Precursor to industrial smog
17
Q

What are the primary causes of nitrogen oxide? What are its immediate and long-term effects on the atmosphere, ecosystems, and human health?

A
  • Main causes: motor vehicle and fossil fuel combustion
    EFFECTS
  • Respiratory irritant, increases susceptibility to respiratory infection.
  • Ozone precursor, leads to the formation of photochemical smog
  • Converts to nitric acid in the atmosphere, which is harmful to aquatic life & some vegetation
  • Contributes to over-fertilizing terrestrial & aquatic systems.
  • Also leads to acid rain
18
Q

Photochemical oxidant

A

A class of air pollutants formed as a result of sunlight acting on compounds such as nitrogen oxides.

19
Q

How is tropospheric ozone (bad) formed? What are its components?

A
  • When nitrogen oxides and VOCs/hydrocarbons react with each other in sunlight
  • 3 oxygen atoms
20
Q

London-type smog; Gray smog

A

Industrial smog (caused by coal burning & limits light & therefore reduces photosynthesis)

21
Q

How does the pollution caused by fossil fuels affect human health and the environment?

A
  • Air pollutants are likely to come in contact with the eyes, nose, & throat, causing irritation
  • Inhaled pollutants exacerbate existing lung conditions & can cause permanent lung damage
  • Air pollutants can damage plant tissue during photosynthesis & respiration
22
Q

What particle impurities are released via coal combustion? What health issues does this kind of pollutant cause?

A
  • Partially combusted “soot”: particulate matter that carries metals and heavier elements into lungs, causes respiratory problems like black lung disease