Ammonia is a compound between hydrogen and nitrogen (NH3). Ninety percent of ammonia emissions in the Netherlands come from agriculture and in particular from manure, when feces and urine are mixed.
The emission of ammonia into the air is called emission. Ammonia molecules in the air settle somewhere else on land, this is called deposition.
The Netherlands has a lot of livestock and therefore also a lot of manure and ammonia emissions. If this deposits on the land, plants that like poor soil - and cannot process as much nitrogen - will be disadvantaged. Plants that thrive in nitrogen-rich soils, such as grass and nettles, will prevail.
