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 1:59 Climate tech conference gets underway in Silicon Valley 3:20 What's in store for the Bay Area this winter 3:09 Push to roll out safer, electric school buses 3:13 Climate change's impact on fall foliage 1:56 49ers doing their part to reduce emissions at Levi's Stadium