Professional Development for Health & Safety Experts CHMM Question 05/18/2017 – Clean Air Act
Which gas is considered the reference gas against which other greenhouse gases are measured? A. B. C. D.
Methane Carbon monoxide Carbon dioxide Nitrous oxide
(Solution on next page)
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Professional Development for Health & Safety Experts
Solution: Carbon dioxide is used as the comparative reference gas for greenhouse gases, and other greenhouse gases are expressed in terms of carbon dioxide-equivalency. The correct solution is C.
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