If CFCs have not been widely used since the late 20^th century, why are they considered a major greenhouse gas in the 21^st century? A)Although they have been banned, they are being use illegally B)CFCs are released by a number of natural processes, such as volcanoes C)Greenhouse gases such as methane will break down into CFCs D)CFCs can stay in the atmosphere for decades

Question

Quizplus · Accepted Answer

CFCs have a long atmospheric lifetime, meaning they can stay in the atmosphere for decades, even after they are no longer being used. This means that CFCs that were released in the past can still contribute to greenhouse gas emissions in the present day. While there may still be some illegal use of CFCs, it is not a major source of their current contribution to climate change. CFCs are not produced naturally and do not break down from other greenhouse gases such as methane.

If CFCs Have Not Been Widely Used Since the Late