Climate Change February 19, 2022 2:29 pm Could Climate Change Impact San Francicso's Sourdough Bread? Scientists are wondering if changing weather could impact San Francisco’s world-famous sourdough bread. Joe Rosato Jr. reports. US & World Videos 2:55 Checking in on the Sierra snowpack 1:27 Christmas trees stressed in warmer climate 1:40 Air pollution concern for respiratory health, study says 1:29 UN hosts climate change conference in Azerbaijan 2:49 California reservoirs' levels drop after a summer of record heat and fire danger
