There is something which I believe you will enjoy hearing about. The Siri Singh Sahib, Yogi Bhajan, was always very protective of the environment at the Ranch where he lived, but most especially about his trees. If anyone on his Ranch wanted to cut down a tree, they had to request an appointment with him personally and get his permission.
I was there once, when he refused permission. He said, "If you want to build a road, you make the road around the tree but that tree will not be cut down."
One time someone asked him, "Sir, how can we honor Guru Ram Das? We always meditate and pray to Guru Ram Das, but how can we actually honor him?" Yogi Bhajan replied, "If you really want to honor Guru Ram Das, plant a tree."