Absolute peak pre-Ghibli animation. 

I was completely blown away by how ahead of its time Nausicaä is. The world is beautifully grim, the giant insects are terrifying yet majestic, and Nausicaä herself is easily one of the greatest protagonists in anime history. It avoids generic good-vs-evil tropes and forces you to think about how humanity treats the planet. It's a hair shy of absolute perfection, only because the final act wraps up a bit abruptly. If you haven't watched this classic yet, drop everything and fix that immediately!

By a way, 80’s version called “Warriors of the Wind” but it’s sucked. Original Japanese Langauge/English Sub & Uncut Disney Dub versions are better.