Climate Change November 4, 2024 4:51 pm Breaking down the greenhouse effect Greenhouse gas emissions have raised the temperature on Earth, and emissions by humans are amplifying that effect. Meteorologist Vianey Arana 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
