- (E) Concentrations of ozone-depleting chlorofluorocarbons (CFCs) have
leveled off in the stratosphere and have actually begun to decline in the
lower atmosphere. A CFC molecule can take about 8 years after being
released at ground level to reach the stratosphere. Decades may pass until it
is converted by sunlight into a form that depletes ozone.
marvins-underground-k-12
(Marvins-Underground-K-12)
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