Question

question 14 (1 point)
which of the six major outdoor air pollutants is a metallic element that is also a significant concern indoors?
a) formaldehyde
b) lead
c) sulfur
d) dioxin

Explanation:

• Formaldehyde is an organic compound, not a metallic element.
• Sulfur is a non - metallic element.
• Dioxin is a group of highly toxic organic compounds.
• Lead is a metallic element. It was previously used in paint (indoor concern as old paint can chip and release lead) and was also an outdoor air pollutant (e.g., from leaded gasoline in the past).

Answer:

B. lead