Which of the following is a primary greenhouse gas associated with human activity?

Chlorofluorocarbons (CFCs) are recognized as a primary greenhouse gas attributable to human activity, particularly because they are synthetic compounds that have been extensively used in refrigeration, air conditioning, and aerosol propellants. While they were popular for their stability and effectiveness in various applications, they have a high global warming potential and contribute significantly to the greenhouse effect by trapping heat in the atmosphere.

When CFCs are released into the atmosphere, they can remain there for many years, leading to long-term impacts on climate change. Furthermore, CFCs also play a role in ozone depletion, which has additional environmental implications. Understanding the role of CFCs is crucial in addressing climate change, as global efforts have been made to phase them out through international agreements like the Montreal Protocol.

In contrast, nitrogen is an abundant gas in the atmosphere but does not act as a greenhouse gas in the context of climate change, as it does not significantly absorb infrared radiation. Argon is another inert gas that, although abundant, has no role in the greenhouse effect. Hydrogen, while it can participate in various chemical reactions, is not classified as a greenhouse gas in the context of anthropogenic climate change. Thus, chlorofluorocarbons