Tree sitting is the practice of physically occupying trees to prevent logging.  This civil disobedience tactic is most frequently employed by environmental activists seeking to protect old-growth forests.  Activists remain in the trees for an extended period, often constructing platforms and even tree villages to facilitate food preparation and other survival strategies. In some cases, tree sitting is a tactic to protect trees from logging efforts while other activists pursue formal protections through legal channels.  

Earth Films produced a documentary about the tree-sit in “Luna,” the Stafford Giant redwood tree. 

Other examples of tree sits can be found here.