Bill Nye has a warning about this 'very serious' problem CNN 0 192 02.14 07:30 https://www.youtube.com/watch?v=60MWf0DiKIw + 22 https://www.youtube.com/feeds/videos.xml?channel_id=UCupvZG-5ko_eiXAup… + 22 Bill Nye has a warning about this 'very serious' problem