Identify air pollutants, their sources, and their effects on the environment.

Identification should include

• a description of the six major pollutants (e.g., ozone, sulfur dioxide [SO₂], nitrogen dioxide [NO₂], carbon monoxide [CO], lead [Pb], particulate matter [PM])
• a description of the pollutants that result from combustion emissions
• methane and ruminant agriculture.

Process/Skill Questions:

• What is smog?
• What is PM, and how does it get into the atmosphere?
• How does agriculture contribute to the amount of methane in the atmosphere?
• Which pollutants are considered to be “greenhouse gases”?
• Which pollutants result from agricultural practices?
• What are examples of natural air pollutants?
• What are other sources of air pollution?
• What is the effect of air pollution on human health?
• What can be done to reduce the amount of air pollution produced?