Nausicaa of the Valley of the Wind
Another Ghibli production with clear anti-war and envieromentalist messaging.
Here, the curse of the world, the toxins that are expelled into the atmosphere, are implied to be a result of human contamination during the industrial age, and interestingly, of massive fires produced by representations of war, which are the Giant Warriors (which I'll get to in a moment). It is made clear that places that have become uninhabitable for humanity are, in fact, recuperating. In these places, nature has had the time to, through natural processes, decontaminate the soil and the water. And humanity has unknowingly been benefiting from this purification.
However, because they cannot directly inhabit these places, humanity seeks to destroy them. Humanity seeks to burn down these places to modify them to human conditions, which would inevitably doom them, both because the purification of vital resources (like water) would stop, and because nature in this anime has very literal protectors which will strike back in retailation, the Ohms.
Seeing the world as it is, seeing how we continually exploit the soil and forests and the sea, bleeding them dry and indeed contaminating them, producing conditions which makes us deprive ourselves of resources due to a lack of sustainable practices, and producing what has been considered to be a sixth mass extinction due to the rate at which species are dissapearing, and the very looming threat of Global Warming, as a sort of ticking time bomb of consequence not unlike the stampeding Ohms, makes me think this is very assertive commentary of the fallacy of human action.
(Seriously, we need to have net zero greenhouse gas emissions by 2050 or large sections of the planet will inevitably become uninhabitable for human life. Under a certain level of heat your body cannot regulate internal temperature anymore and you would die.)
Of course, the humans in the anime have no idea how nature will react to their attempts to solve the crisis, ignorance gets in their way, and are too busy fighting to learn more. The only ones who learn the truth from Nausicaa (because she has been studying nature and has found the caverns of purified soil and water) immidiately jump in to help her stop the crisis. We, human of the real world, know exactly what is going to happen, why, what we can do about it, and the time frame we have to do it. Hopefully, we will react a little better than the humans in this anime because at least they have the excuse of not knowing.
Now about the anti war message tied in...
If you saw the Oppenheimer movie, you probably know that in making nuclear bombs, the scientists working on the project considered the possibility that the whole of Earth's atmosphere might get caught up in the chain reaction and we could have all, all life on Earth, have died. And then they tested the bomb anyway. And you know- maybe you did not think of a nuclear bomb while watching this movie. Maybe the skin melting off a humanoid figure after two, two, not one, explosions was not on the nose. I was looking at this scene with my mouth hanging open.
As I mentioned earlier, the characters in this movie, the humans, are too busy involving themselves in war, shooting first and asking questions later, to be able to communicate and know how to save themselves. They think their violent efforts are necessary and will lead to salvation. Some think that accumulating power under a single empire will allow them to save the world, so they go in soldiers first, attempting collaboration never. Their greatest weapon of mass destruction shoots directly at the symbolic consequence of harming nature, and they were, of course, still in a direct course for death.
They are saved by the protagonist, who is hinted at being a literal messianic figure, sacrificing her life in the process of giving something back to nature, and she is brought back to life as a symbolic representation of the forgiveness of nature.
So I would say the humans in this movie are quite lucky to have Nausicaa.
Maybe we will be as lucky. Hopefully we are not caught up in wars, at least three of armed nature, and we can do better.
Nausicaa, who throughout the movie is almost entirely consistent. She cares about all life, does not want anyone to die or be killed, even if they dirctly harmed her, and she respects, and tries to understand, nature. If there's a role model for anyone, she is it.