Miyazaki's original manga. This is the first of seven volumes.

From the publisher:

An epic fantasy tale written and illustrated by the legendary director Hayao Miyazaki! In a long-ago war, humankind set off a devastating ecological disaster. Thriving industrial societies disappeared. The earth is slowly submerging beneath the expanding Sea of Corruption, an enormous toxic forest that creates mutant insects and releases a miasma of poisonous spores into the air.At the periphery of the sea, tiny kingdoms are scattered on tiny parcels of land. Here lies the Valley of the Wind, a kingdom of barely 500 citizens; a nation given fragile protection from the decaying sea's poisons by the ocean breezes; and home to Nausicaä. Nausicaä, a young princess, has an empathic bond with the giant Ohmu insects and animals of every creed. She fights to create tolerance, understanding, and patience among empires that are fighting over the world's remaining precious natural resources.