Yuma County, Arizona, is known as the "Winter Salad Bowl Capital." From lettuce to cilantro to broccoli, the region produces almost all the leafy green vegetables consumed in the U.S. during winter months. Farmers there rely on the nearby Colorado River and as the West contends with drought and a changing climate, they've had to adapt. Stephanie Sy reports. PBS News is supported by - https://www.pbs.org/newshour/about/funders