Out of town for the radio show, but here is some music I would have played as a belated Arbor Day celebration.
Nomos, Esperanza Spalding (feat. Milton Nascimento), John Kaizan Neptune, Chava Alberstein & The Klezmatics, George Mraz (feat. Zuzana Lapčíková), Leni Stern, The Flock, Amikaeyla & Trelawny Rose, an uncredited Chinese musician, and children of an uncredited minority culture of China (Black Pepper Tree Planting Song) (recorded by Deben Bhattacharya) (playlist in Comments)
photo - all trees by David DeHetre https://www.flickr.com/photos/davedehetre/6637737569/