Final answer:
HFCs contribute to global warming, while both HFCs and CFCs damage the ozone layer.
Step-by-step explanation:
Hydrofluorocarbons (HFCs) and chlorofluorocarbons (CFCs) are both gases that have contributed to global warming and damage to the ozone layer.
HFCs are greenhouse gases that do not contain chlorine or bromine, so they do not directly deplete the ozone layer. However, they have a significant global warming potential and contribute to climate change.
CFCs, on the other hand, not only contribute to global warming but also damage the ozone layer. When CFCs are released into the atmosphere, they can reach the stratosphere and break down ozone molecules. This depletion of ozone can lead to harmful ultraviolet radiation reaching the Earth's surface.