Community fridges have been popping up all over the Bay since the pandemic began as a form of mutual aid, which has deep roots here. There's a long history of this kind of community care, especially around food insecurity. Private companies have also used similar language to describe some of their own efforts. But KQED food writer and columnist Ruth Gebreyesus writes that the values of mutual aid are distinct — and worth protecting. Guest: Ruth Gebreyesus, food reporter and columnist for KQED Arts and Culture