1. Hydrofluorocarbon - HFC: A substitute for chlorofluorocarbons.

2. He hopes that the machines will lead Coke to globally phase out the use of hydrofluorocarbon refrigerants, which contribute to global warming, though the company hasn't set a timeline for this.

3. The HFC (hydrofluorocarbon) refrigerant currently used in virtually every American model car and truck, HFC-134a, has a GWP of 400 compared to the new refrigerant's (HFC-1234yf) GWP of just four.