You go onto the AirNow website, enter your zipcode, and receive ...

[ts19998]

You go onto the AirNow website, enter your zipcode, and receive your local AQI for the EPA's criterion pollutants. Your AQI is 136. You spent about an hour outside today doing yardwork.
 
  Based on these graphs, you should be most concerned about your exposure to ________.
 
  A) ozone
  B) particulate matter
  C) nitrogen dioxide
  D) lead
  E) none of these, as you are a very healthy person
 
  A. Secondary chemicals whose formation is facilitated by sunlight
  B. Gases or particles that are present in high enough concentrations to harm humans, other organisms, and buildings and other structures
  C. Amount of gases and small particles in the atmosphere that influence ecosystem or human well-being
  D. Organic chemicals that can vaporize into the air
  E. Very small solid and liquid particles suspended in the air

Question 2

Which one of the following is the MOST abundant gas in the atmosphere?
 
  A) nitrogen
  B) carbon dioxide
  C) oxygen
  D) hydrogen
  E) argon

[medine]

Answer to Question 1

C

Answer to Question 2

A