Alameda April 5, 2024 6:27 pm Cloud brightening: First-in-nation tech aims to cool our warming planet Scientists are testing a controversial idea in the Bay Area for cooling our warming planet. Velena Jones has the story. US & World Videos 1:01 Steph Curry's BottleRock Napa Valley appearance with Bradley Cooper draws large crowd 2:21 Alcatraz ferry workers strike amid start of summer tourism season in San Francisco 0:22 Man arrested following police activity in San Ramon 2:26 Residents react following deadly shooting in Belmont 21:53 NBC Bay Area presents: AANHPI Amplified special