Which of the following is NOT one of the six criteria air pollutants?

Question

BlackTom AI · Accepted Answer

To tackle the question, first recall what the six criteria air pollutants are according to U.S. EPA: ground-level ozone (O3), particulate matter (PM2.5 and PM10), carbon monoxide (CO), lead (Pb), sulfur dioxide (SO2), and nitrogen dioxide (NO2).
Option 1: Lead. Lead is indeed one of the six criteria pollutants, historically monitored due to its harmful health effects, so this option describes a pollutant that is part of the list.
Option 2: Sulfur Dioxide. Sulfur dioxide is also one of the six criteria pollutants, associated with respiratory issues and environmental impacts, so this option is included in the list of criteria pollutants.
Option 3: Carbon Dioxide. Carbon dioxide is not among the EPA’s six criteria pollutants. While CO2 is a greenhouse gas with climate implications, it is not regulated as a criteria pollutant under the same framework.
Option 4: Ozone. Ground-level ozone is a core member of the six criteria pollutants, known for its role in smog and respiratory problems, so this option is clearly part of the criteria set.
In summary, options 1, 2, and 4 correspond to pollutants that are within the EPA’s six criteria pollutants, whereas option 3 does not fit that category because carbon dioxide is not included in the six criteria pollutants roster.

ENV H 311 A Air Pollution & Health Reading Quiz

Which of the following is NOT one of the six criteria air pollutants?

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