Just watched this one the other day, and I was surprised to learn that it was originally released in 1984, then re-dubbed and re-released in 2005. It's a really wonderful anime by my favorite anime director, Hayao Miyazaki, about pollution and pacifism. It's got quite a good cast re-voicing it, including Patrick Stewart and Uma Thurman. The storyline revolves around this young girl who is a princess in her valley. She is praised for her ability to soothe animals, and also to ride her glider on the wind. The Ohmu and other giant insects guard the toxic jungle, keep humans out, and protect their own territory. The Toxic Jungle is a place both of beauty and of danger, due to the insects and to the plants which release deadly spores due to the pollution.
It's a fascinating movie, and only gets more insightful when you consider when it was originally made.