I saw a special once where they solved the garbage issue by hydraulically compressing it into blocks about 2' X 2' then coating with a sealing compound (looked like tar but may be something else environmentally friendly. The finished blocks were hard as concrete. They then took the blocks and used for road construction base. They solved the garbage issue and improved the quality of roadways. I think it was in Japan but could have been another island. The blocks could probably be useful for other public works projects or sold off island for projects.