`"Those primitive people, so in touch and in balance with nature, could really teach us modern pigs a lesson or two about how to save the planet! "
To try to save the planet is going against what is natural. Because in the nature, no animals or plants care about the planet, they only care about their own species and they will do everything for survival. They will drain the ressources until it's gone and they will leave the place to find another one where those ressources thrives. When it's not destructive, it's when there's no species who are strong or numerous enough to destroy all the ressources around them. It's nature as a whole who can balance itself. The humans are at the point where they are powerfull enough to destroy all life on earth, (maybe except the bacteria), and they have "potentially" enough of ingeniosity and nobility to fulfill the role of natural balance (Maybe I'm to idealistic about the human race)
People in general don't know about nature. They think it's all peacefull, joyous like in the care bear or something.