Of the following greenhouse gases,which have actually decreased in atmospheric concentrations during the past 30 years? A)HFCs B)Nitrous oxides (N₂O) C)Chlorofluorocarbons (CFCs) D)Methane (CH₄)and carbon dioxide (CO₂)

Question

Quizplus · Accepted Answer

Chlorofluorocarbons (CFCs) have decreased in atmospheric concentrations due to the implementation of the Montreal Protocol, a global agreement to phase out the production and consumption of ozone-depleting substances including CFCs.

Of the Following Greenhouse Gases,which Have Actually Decreased in Atmospheric