Filmmaker Jeff Orlowski's new documentary "Chasing Ice" shows the edge of the massive Ilulissat glacier in Greenland collapsing - or "calving" - and violently crashing into the sea below. It's just one of many spectacular scenes in the film. Balog, a well-known photographer whose work often explores the relationship between humans and nature, is the subject of director Jeff Orlwoski's movie, which won the Excellence in Cinematography Award at this year's Sundance Film Festival. Orlowski, along with a small and courageous team, followed Balog as he set up more than 20 time-lapse cameras in remote locations around Alaska, Montana, Nepal, Iceland and Greenland as part of his Extreme Ice Survey (EIS) to capture images of Arctic glaciers as they melt. Each camera that Balog built was made to withstand extreme conditions, including sub-zero temperatures and 240km/h winds. "Chasing Ice" hits movie theatres in Europe in December. More about: Documentary, Environmental protection, global warming