I n the eastern reaches of Java, Indonesia, the Kawah Ijen volcano stuns the world with a spectacle of neon-blue flames lighting up its crater at night. While it appears as if the volcano is ...

Indonesia has 127 active volcanoes. Only the U.S. (168 ... Sunarto, 41 years old, carries a load of sulfur out of the Kawah Ijen crater.

inside the crater of the Kawah Ijen volcano lies a landscape bereft of life. A turquoise lake of sulfuric acid bubbles like a sorcerer's cauldron, and the earth belches great plumes of acrid smoke.

So why do they do it? In this episode of Risky Business, we head to the Ijen volcano to find out. More from Risky Business In East Java, Indonesia, hundreds of miners face deadly smoke to mine ...