When I drive home from work, I sometimes pass the old Kaiser plant. For some reason, I find it compelling to see the barren tree branches standing before the monolithic face of industrial brick. On the one hand, the ruins of industrialism are sober reminders of environmental destruction on a massive scale. On the other hand, I sometimes lay awake wondering how these places might be reclaimed and revitalized.
In the end, the message of the tree might be the assurance that nature will reclaim itself on a non-human time scale. If we're lucky, we might get to help the process. Otherwise, our descendants may be the ones to witness these changes.