"Höllenfeuer – Leben auf heißen Kohlen" is a 60-minute ARTE documentary by John A. Kantara, first broadcast in March 2010, that investigates one of the world's least visible environmental catastrophes: underground coal seam fires. Travelling through northern China near the border with Inner Mongolia, where more than 750 coal seams burn along a 5,000-kilometre stretch, and into India's Jharia coalfield – where seams have been alight for over a century – the film documents the human and ecological toll of fires that swallow entire villages, collapse mine shafts and release toxic gases into the atmosphere. Kantara follows scientists at the German Remote Sensing Data Center as they use temperature-sensitive satellite sensors to map the blazes, and meets residents living directly above them. The documentary places these largely overlooked emissions within the wider global climate debate, showing how a hidden source of CO₂ burns away beneath some of the world's largest energy economies.