Nausicaä Of The Valley Of The Wind

In the far future, man has destroyed the Earth in the 

"Seven Days of Fire". Now, there are small  pockets of 
  
humanity that survive. One pocket is the Valley of Wind 

where a princess named Nausicaa tries to understand, 

rather than destroy the Toxic Jungle. Note that the old

US releases titled Warriors of the Wind is an entirely 

kiddiefied version which edits the original movie heavily, 

thus creating an entirely different story.