Trying not to bother the neighbours

Having a pig production site in the close vicinity of a village may cause some trouble, wherever you are in the world, due to unwanted odours. In Denmark, tight emission legislation makes the situation even more difficult. No wonder the most creative solutions can be found in Denmark. By Vincent ter Beek As a student in microbiology, Mathias Andersen frequently came across the ‘counter-current principle’, a system in nature in which fluids or gases going in opposite directions influ