Short answers, pulled from the story.
Nausicaä of the Valley of the Wind was released in Japan on the 11th of March 1984. It opened on a double bill with a compilation of episodes from the Italian-Japanese anime series Sherlock Hound.
Joe Hisaishi composed the score for Nausicaä of the Valley of the Wind. It was his first collaboration with director Hayao Miyazaki. The theme song was composed by Haruomi Hosono and sung by Narumi Yasuda.
Warriors of the Wind is an edited English-language version of Nausicaä of the Valley of the Wind produced by Manson International and released in the United States by New World Pictures on the 14th of June 1985. It was cut by approximately 22 minutes from the 117-minute Japanese original, most character names were changed, and the environmentalist themes and the Ohm subplot were significantly simplified.
Nausicaä of the Valley of the Wind was produced by Topcraft in 1984, before Studio Ghibli was founded. It is considered associated with Ghibli because its themes align with the studio's later work, its commercial success directly enabled Ghibli's founding, and it is routinely included in DVD and Blu-ray collections of Ghibli titles.
Hideaki Anno, a founding member of Gainax, drew the Giant Warrior's attack sequence. Producer Toshio Suzuki described it as a high point in the film. Anno has stated that his later series Neon Genesis Evangelion is a continuation of Nausicaä done in his own way.
The mercury poisoning of Minamata Bay inspired Miyazaki's depiction of a toxic but ecologically active world. He was struck by how nature responded and continued to function in a poisoned environment, and used that observation as the basis for the Toxic Jungle and its underground purification cycle.