What makes a hydrofluorocarbon different from a chlorofluorocarbon?

The difference is that a hydrofluorocarbon added fluorine for chlorine in a chlorofluorocarbon.

The difference is that a hydrofluorocarbon substitutes fluorine for chlorine in a chlorofluorocarbon.

The difference is that a hydrofluorocarbon removed hydrogen for chlorine in a chlorofluorocarbon.

The difference is that a hydrofluorocarbon substitutes hydrogen for chlorine in a chlorofluorocarbon.