Unit 6 Air Pollution sources and pollution roles

Question 1

Carbon Dioxide (CO2)

Answer 1

Anthropogenic: Burning fossil fuels, deforestation.

Natural: Organism decomposition, respiration.

Greenhouse gas: Yes.
Ozone depletion: No.
Photochemical smog: Primary pollutant.
Acid deposition: Yes.

Question 2

Methane (CH4)

Answer 2

Anthropogenic: Biofuels, livestock farming, landfills.

Natural: Wetlands, oceans.

Greenhouse gas: Yes.
Ozone depletion: No.
Photochemical smog: No.
Acid deposition: No.

Question 3

Carbon Monoxide (CO)

Answer 3

Anthropogenic: Incomplete combustion of fossil fuels.

Natural: Volcanic eruptions, forest fires.

Greenhouse gas: No
Ozone depletion: No
Photochemical smog: Primary pollutant
Acid deposition: No

Question 4

Nitrous Oxide (N20) and NOx

Answer 4

Anthropogenic: Motor vehicle exhausts, manure, soil fertilizers.

Natural: Lightning.

Greenhouse gas: Yes
Ozone depletion: Yes
Photochemical smog: Primary pollutant Acid deposition: Yes.

Question 5

Ozone (O3)

Answer 5

Secondary pollutants are formed from primary pollutants and sunlight.

Greenhouse gas: Yes
Ozone depletion: N/A
Photochemical smog: Secondary pollutant
Acid deposition: No

Question 6

CFCs and HCFCs

Answer 6

Anthropogenic: Refrigerants, propellants in spray cans

Greenhouse gas: Yes
Ozone depletion: Yes
Photochemical smog: No
Acid deposition: No

Question 7

Methyl Bromide

Answer 7

Anthropogenic: Pesticides

Greenhouse gas: No
Ozone depletion: Yes
Photochemical smog: Primary pollutant Acid deposition: No

Question 8

Hydrocarbons

Answer 8

Anthropogenic: Burning fossil fuels, inefficient motor vehicle combustions.

Greenhouse gas: No
Ozone depletion: No
Photochemical smog: Primary pollutant
Acid deposition: No

Question 9

Sulphur Dioxide (SO2)

Answer 9

Anthropogenic: Motor vehicle combustion, burning of fossil fuels

Natural: Volcanic eruptions
Greenhouse gas: No
Ozone depletion: No
Photochemical smog: Primary pollutant
Acid deposition: Yes

Question 10

Hydrofluorocarbons (HFCs)

Answer 10

Anthropogenic: Refrigerants, propellants in spray cans

Greenhouse gas: Yes
Ozone depletion: No
Photochemical smog: No
Acid deposition: No

Question 11

Volatile Organic Compounds (VOCs)

Answer 11

Anthropogenic: Road transport, solvents.

Greenhouse gas: No
Ozone depletion: No
Photochemical smog: Primary pollutant Acid deposition: No