This Green Earth | December 20, 2022 By Nell Larson, Chris Cherniak, Claire Wiley Published December 20, 2022 at 2:00 PM MST Listen • 50:05 Ways To Subscribe Apple Amazon Music Overcast Spotify TuneIn YouTube Music Chris Celentano / americanforests.org Whitebark pine Western Forest Science manager on saving "threatened" whitebark pine (01:20)Environmental journalist discusses fight against extinction in new book (22:40)