Valley of the Wind

An anime series based on the manga Nausicaa of the Valley of the Wind

Premise
''1000 years after a devastating event called The Seven Days of Fire, humanity has been reduced to mere slivers of its population and live in fear of a toxic forest called the Fukai and its gigantic insect inhabitants. Now, the young princess Nausicaa sets off to uncover the forest's secrets in order to change the fate of humankind all the while participating in a war for the planet's remaining resources''

Trivia
The series is a much more faithful adaptation of the manga it's based on.