No stopping Chile's clean energy transformation

Cerro Pabellón, Chile

IT LOOKS and functions much like an oil drilling rig. As it happens, several of the men in thick blue overalls and white helmets who operate the hulking machine once made a living pumping crude.

But now they are surrounded by snowcapped volcanoes, labouring to breathe up here at 14,760 feet (4.5km) above sea level as they draw steam from the earth at South America's first geothermal energy plant.