Whenever I start to feel especially "Princess Mononoke-y" about the devastation to the planet + our idiotic short-sighted annihilation of our species along with everything else, I try to remember the message of the movie: rage is a disease and it spreads with absolute ease.
Countering the Disease of Rage
When I'm angry about the slow decline of our planet, it's grief because I love our world. Others are aggrieved too, they just don't realize it. We're just as much a part of this terrestrial mother as any animal or plant. Maybe if they woke up to that fact they would care.