Scientists are testing a controversial idea in the Bay Area for cooling our warming planet. Velena Jones has the story. Stay Connected: Follow us on Twitter: http://www.twitter.com/nbcbayarea Like us on Facebook: http://www.facebook.com/nbcbayarea Follow us on Instagram: http://www.instagram.com/nbcbayarea Follow us on TikTok: https://www.tiktok.com/@nbcbayarea Catch up on all the day's news: http://www.nbcbayarea.com/ Download our mobile app: On iOS: http://nbcbay.com/R1BhqYM On Android: http://nbcbay.com/rUcA97h Watch us on OTT: Add our channel on Roku: https://bit.ly/3ySK60j Download our app on Amazon Fire TV: https://amzn.to/3FmmiEA