Incarnation is the giving of human form ----------------------------------------------------- Greed is wanting what others have. The humans had so much greed, they couldn’t see past it. They wanted the unobtanium but the na’vi’s home was on top of it. But they didn’t care, all the humans cared about was more. They were so greedy that they were will do do anything to get rich, even kill thousands of people.
Environment is just the natural world.