https://permacultureprinciples.com/principles/_5/

Trees. A central part at the heart of every ecosystem supportin’ human habitation. A station for renewal of many a good & service: fiber, fuel, food (for humans), fodder (for animals), farmaceuticals, and all kinds o’ fun. Did I mention they live off the sun? And the soil. And in a few hundred million years, they may be renewed to rock oil. But unlike oil, dead ‘nd deadly indeed, trees can be better than free for what you need. Paying you back in fact and potentially if the way you both act is of mutual benefit, then you’re sending it: succession through time. May the force of the forest be with you!