Final answer:
Criteria Air Contaminants are pollutants with established air quality standards by the EPA, including carbon monoxide, ozone, nitrogen dioxide, sulfur dioxide, lead, and particulate matter, which can cause various health effects and environmental damage.
Step-by-step explanation:
Criteria Air Contaminants are pollutants for which the Environmental Protection Agency (EPA) has established air quality standards to protect public health and the environment. Therefore, the correct answer to the question is b) Are pollutants with established air quality standards. These are not exclusively greenhouse gases, they do impact human health and are regulated by environmental agencies.
The six criteria pollutants regulated by the EPA include carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide. These key air pollutants can cause serious health and environmental problems, affecting the respiratory, nervous, and cardiovascular systems, among others.
By setting the National Ambient Air Quality Standards, the EPA aims to control the concentration of these pollutants and thereby reduce the harm they can cause to public health and welfare, including sensitive populations such as children and the elderly.