Indonesia struggles to tap volcano power

Columns of steam shoot from the ground at an Indonesian power plant sitting in the shadow of an active volcano, as energy is tapped from the red-hot underbelly of the archipelago.

Pipes zigzag up rugged mountainsides covered in tea plantations, carrying steam from the Earth's core to power enormous, electricity-generating turbines at the Wayang Windu facility on Java island.

Indonesia, a seismically-active island chain studded with scores of volcanoes, holds an estimated 40 percent of the world's geothermal energy reserves, but has long lagged behind in its use of the renewable power source.