HFCs ________;

The correct assertion regarding hydrofluorocarbons (HFCs) is that they will not damage stratospheric ozone, but have a high global warming potential (GWP). HFCs were developed as alternatives to substances that were responsible for ozone depletion, such as chlorofluorocarbons (CFCs). As a result, HFCs do not contribute to the thinning of the ozone layer since they lack chlorine atoms, which are responsible for the destruction of ozone molecules.

However, HFCs are potent greenhouse gases and can have a high GWP, meaning they can contribute significantly to climate change, even in smaller quantities. This characteristic makes their management and potential phase-out crucial in climate policy discussions. Understanding this dual aspect of HFCs is essential for effective environmental regulation and for strategies aimed at mitigating climate change impacts while protecting the ozone layer.

The other statements do not accurately reflect the properties of HFCs: they do not harm stratospheric ozone, nor do they possess a low GWP.