What best describes chlorofluorocarbons?

Chlorofluorocarbons (CFCs) are best described as known ozone depleters that have been targeted for banning due to their harmful effects on the stratospheric ozone layer. CFCs were commonly used in refrigeration, air conditioning, and aerosol propellants, but their impact on ozone depletion has been well-documented. When CFCs are released into the atmosphere, they eventually rise to the stratosphere, where UV radiation breaks them down and releases chlorine atoms. These chlorine atoms can catalyze the destruction of ozone molecules, leading to significant thinning of the ozone layer, which protects life on Earth from harmful ultraviolet radiation.

Recognizing this environmental impact, global agreements like the Montreal Protocol have been put in place to phase out the production and use of CFCs, making them a focal point in discussions about air pollution and atmospheric protection.