‘Nausicaa of the Valley of Wind’
Humanity, in its hubris, has precipitated an ecological disaster. Flourishing industrial civilizations have been swallowed up and Earth is covered by the Sea of Corruption, an enormous forest of fungi that releases a miasma of poisonous spores into the air.
Nausicaä, a gentle young princess, has an empathetic bond with the giant mutated insects that evolved in the wake of the destruction of the ecosystem. Traveling by cumbersome flying ship, on the backs of giant birds, and perched atop her beloved glider, Nausicaä and her allies must negotiate peace between kingdoms battling over the last of the world’s precious natural resources…
Note: technically speaking this is not done by studio Ghibli as that was founded 1985. However, the beginning of the studio can be dated back to 1983, when Tokuma Shoten (Tokuma Publishing, Co., Ltd) decided to produce “Nausicaa of the Valley of Wind”. After the success of “Nausicaa”, Tokuma and Miyazaki decided to make their second movie, “Laputa”, and they established Studio Ghibli. The work credit for Nausicaa is given to Top Craft (トップクラフト) instead.
Descriptions taken from AniDB.net