Batu Hijau, Indonesia

The Batu Hijau mine is an open pit copper-gold mine on the island of Sumbawa, 1,530km east of the Indonesian capital Jakarta. It is Asia’s second-largest copper mine, and along with its processing and support facilities, worker accommodation and dedicated port, it occupies 1,320 hectares. Production began in 2000; environmentalists have expressed concern at the disposal of waste rock in the surrounding rainforest and mine tailings in the deep ocean off the island’s coast.