20 million Americans still don’t have enough to eat. A grass-roots movement of free fridges aims to help.

“We appreciate the many ways that Philadelphians look out for one another, especially to combat hunger and make food accessible,” said Sarah Peterson, a spokeswoman for Philadelphia Mayor Jim Kenney (D). She added: “From a health perspective, community fridges are not a city-sanctioned food distribution strategy. Unlike food establishments that the Office of Food Protection inspects, we cannot be sure of the provenance of the food, whether it has been properly stored, that it hasn’t been adulterated, and that the refrigerators are in good, working order and cleaned regularly.”