At the Kawah Ijen
Clip: Episode 2 | 2m 50s
At the Kawah Ijen volcano in Indonesia, bright yellow elemental sulphur is mined, but the valuable sulphur is also flammable and easily catches fire. It burns with a blue flame but also produces choking fumes of sulphur dioxide. Each night a team of workers must brave the harsh conditions and put out the flames to keep the mine active and the sulphur pure.
Aired: 09/20/16Video has closed captioning.