What are halocarbons known for in relation to the environment?

Halocarbons are primarily known for their role in depleting the ozone layer and contributing to global warming. These substances, which include chlorofluorocarbons (CFCs) and other related compounds, have been widely used in refrigeration, aerosol propellants, and as solvents. When halocarbons are released into the atmosphere, they eventually rise to the stratosphere, where they can break down ozone molecules. This depletion of the ozone layer is critical because the ozone layer serves as a protective shield that absorbs the majority of the sun's harmful ultraviolet (UV) radiation.

Additionally, halocarbons are potent greenhouse gases that trap heat in the atmosphere, contributing to global warming. Their ability to absorb thermal radiation significantly impacts the climate, making them much more effective at warming the planet than carbon dioxide on a per-molecule basis. In summary, the environmental concern around halocarbons is centered on their dual role in harming the ozone layer and amplifying climate change.