STB-4.B—Describe chemicals used to substitute for chlorofluorocarbons (CFCs)

Describe chemicals used to substitute for chlorofluorocarbons (CFCs).

• Ozone depletion can be mitigated by replacing ozone-depleting chemicals with substitutes that do not deplete the ozone layer. Hydrofluorocarbons (HFCs) are one such replacement, but some are strong greenhouse gases.
• Enduring understanding STB-4: Local and regional human activities can have impacts at the global level.