What role do chlorofluorocarbons play in the environment?

Chlorofluorocarbons (CFCs) play a significant role in environmental issues, primarily due to their contribution to ozone depletion. These man-made chemicals were widely used as refrigerants, propellants, and solvents. When CFCs are released into the atmosphere, they eventually rise up to the stratosphere, where they are broken down by ultraviolet (UV) radiation. This breakdown releases chlorine atoms, which can then react with ozone (O3) molecules, causing the depletion of the ozone layer.

The ozone layer is crucial for protecting life on Earth, as it absorbs the majority of the sun's harmful ultraviolet radiation. The thinning of this layer leads to increased UV exposure, which can result in higher rates of skin cancer, cataracts, and adverse effects on various ecosystems. Thus, the primary environmental impact of CFCs is their role in depleting the ozone layer, making them a significant concern for environmental scientists and policymakers.