Coca-Cola Co. is becoming more environmentally aware by changing the refrigeration industry, replacing its conventional vending machines with a model that has less impact on the planet. Vending machines typically rely on a type of refrigerant known as hydrofluorocarbons (HFCs), a chemical 1,430 times more harmful than carbon dioxide.

The proof that natural refrigerants work is our grandparents had refrigerators charged with ammonia, propane and carbon dioxide,” says Kert Davies, director of research for Greenpeace.

“We’re working with huge companies that are all working on solid alternatives to HFCs,” says Davies, naming Coca-Cola, Unilever and Pepsi-Co. “Coke prefers compressed carbon dioxide, although they also utilize hydrocarbons.”