Milk Heat - 2009 radiator, water pipe Format variable Photos: Anders Norrsell Courtesy Wanås Foundation Milk Heat lets visitors experience the fresh milk's heat through a conventional radiator placed outside the stable of an organic farm in Wanas called Wanas Gods AB. Tue Greenfort attempts to visualize the general impact animal farming has on environment - whether organic or not. He questions if dairy products can be considered ecologically sustainable food sources since cows' methane have a negative impact on the climate. Quote: "Livestock are responsible for 18 per cent of the greenhouse gases that cause global warming, more than cars, planes and all other forms of transport put together." 'Livestock's Long Shadow', from FAO (Food and Agriculture Organization of the United Nations), Rome, 2006.