Birdboy: The Forgotten Children

The island home of the cast of talking animals was once a fishing community with a pristine environment. Birdman, the father of Birdboy, tended the lighthouse that guided the fishing boats. Then a factory was built and many islanders went to work there. But one day, the factory exploded, devastating much of the island and killing all the fish. The destroyed part of the island became a landfill. After the explosion, Birdman began flying around the island mysteriously, carrying a satchel. The police came to believe that he was trafficking drugs, and they eventually shot him dead, but his satchel actually contained strange glowing golden acorns. Read more on Wikipedia.