Question

which greenhouse gas lasts the longest in the atmosphere? cfcs water vapor

Explanation:

Chlorofluorocarbons (CFCs) are synthetic compounds. They are extremely stable. In the atmosphere, they can persist for a very long time because they are not broken down easily by natural processes like many other substances. Water vapor, on the other hand, has a relatively short residence time in the atmosphere as it condenses and falls as precipitation.

Answer:

CFCs