Page 9 of articles about ammonia
Spain - MARM presents ECOGAN
Comparison of ammonia and greenhouse gas emissions from fattening pigs kept either on partially slatted floor in cold conditions or on fully slatted floor in thermoneutral conditions

Environmental control in the growing phase (I): Checking the environment
Man is possibly the only animal capable of living in practically all places in the world, regardless of the climate. This is due to his capacity to construct buildings to isolate himself from the climate however extreme it may be, maintaining an environment which allows him to survive. As domestic animals live together with man, they have to take advantage indirectly of this capacity.