Select the correct answer.
Residence time is the amount of time in which a substance remains in a reservoir, such as the atmosphere. For example, the residence time of
carbon tetrafluoride (CF) in our atmosphere is more than 50,000 years. In contrast, carbon dioxide (CO2) has a residence time that is much
shorter. Which statement best explains how the residence time of a substance affects the atmosphere?
OA. Substances that have a longer residence time are more beneficial to the atmosphere.
OB. Substances that have a shorter residence time make up a smaller portion of the atmosphere.
OC. Substances that have a longer residence time will cycle faster through the atmosphere.
OD. Substances that have a shorter residence time do not stay in the atmosphere as long.
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