At the time, mankind was ruining the environment, making an apocalypse of some sort inevitable (similar to other environmentally-focused anime like Nausicaä of the Valley of the Wind; in general style, Green Legend is much like Nadia: The Secret of Blue Water and Future Boy Conan).
Park had been a big fan of Japanese animation director Hayao Miyazaki's work since he watched Future Boy Conan as a child.
Arthur Conan Doyle | Boy Scouts of America | Back to the Future | Late Night with Conan O'Brien | Conan the Barbarian | Game Boy Advance | Fall Out Boy | Game Boy | Conan O'Brien | Sir Arthur Conan Doyle | Boy George | Boy Meets World | Danny Boy | Conan | boy band | Badly Drawn Boy | Astro Boy | Golden Boy | Future Shop | The Judas Boy | Game Boy Color | Soulja Boy | Odd Future | Boy Scouts of the Philippines | Tommy Boy Entertainment | The Winslow Boy | Sonny Boy Williamson II | John Boy and Billy | Conan the Barbarian (1982 film) | The Tonight Show with Conan O'Brien |