While some acidification is caused by factory and vehicle emissions, the major fault lies with high ammonia levels in animal waste generated by the country's cattle industry. (newscientist.com)
After entering the building, health inspectors closed off the top three floors because of high ammonia levels. (articles.chicagotribune.com)
Rough seas, crowded conditions, temperature extremes and high ammonia levels from the buildup of waste — all exacerbate the risk of illness and injury. (animalsaustralia.org)