The best replacement for cfc is hfa.

The best alternatives to cfc are rated as following:
★★★★★  hfa
★★★  hcfc
★★  hfc
★★  dfc
★★  hfa inhalers
★★  n3
★  pfic
★  test
★  chlorofluorocarbon
★  pl

Your alternative for cfc is not listed? Suggest!
Speaking about cfc, one probably shouldn't forget about ozone.

Other search terms related to cfc and their ratings are:
★★★★★ ozone
You have in mind a companion for cfc and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cfc in all years. Click on graph for more.
cfc
hfa
hcfc