Darrell Brokenborough opened the bright yellow refrigerator that stood on the sidewalk outside a row home at 308 N. 39th St., smiled and said, "It's full." He balanced on his cane so he could take a closer look at the apples, yogurt, greens, pasta, cheese and chicken inside. On the front of the fridge was written: "Free food" and "Take what you need. Leave what you don't." Philadelphia now has more than 20 of these refrigerators sitting outside homes and restaurants, offering free food to anyone passing by. Volunteers keep the fridges clean and stocked with food donated from grocery stores, restaurants, local farmers and anyone with extra to share. The concept of the community fridge sometimes called a "freedge" has been around for more than a decade, but it exploded during the pandemic as hunger spiked in the United States and worldwide. There are now about 200 of these community fridges in the United States, up from about 15 before the pandemic. "What we're learning is when you do something like this, people will support it. People do have goodness and kindness, and they will bring food," said Michelle Nelson, founder of Mama-Tee.com, which now runs 18 bright yellow fridges in Philadelphia and has been inundated with requests to put more in place throughout the country. Nelson said the effort is part of the movement known as "mutual aid," where people, even those struggling, want to help one another and have a stake in the project.