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www.reference.com/science/ammonia-come-66353eba7adaef89

Where Does Ammonia Come From? Ammonia comes from decaying organic matter and the excrement of humans and animals. A small amount of ammonia comes from fertilizers, waste disposal sites and industrial processes. A colorless, pungent and corrosive gas, ammonia occurs in nature and is produced artificially by humans. It can be stored under high ...

en.wikipedia.org/wiki/Ammonia

This is an efficient way to package hydrogen into a chemical that is much cheaper to store and transport than pure hydrogen be it as gas or as liquid. In fact, per volume ammonia holds more hydrogen than does liquid hydrogen. Ammonia may be the key to overcome not only the daily but also the seasonal fluctuations of renewable energy sources.

www.health.ny.gov/.../chemical_terrorism/ammonia_general.htm

The widespread use of ammonia on farms and in industrial and commercial locations means that exposure can also occur from an accidental release or from a deliberate terrorist attack. Ammonia gas is lighter than air and will rise, so that generally it does not settle in low-lying areas.

www.interestinganswers.com/science/where-does-ammonia-come...

In nature, ammonia comes from decaying organic matter and the excrement of humans, livestock, and particularly aquatic animals. Prior to World War I, most ammonia was obtained by a process using this organic matter. Small amounts of ammonia also exists in soil, but too much of it can harm vegetation.

apps.sepa.org.uk/spripa/Pages/SubstanceInformation.aspx?pid=1

Where does it come from? The main sources of ammonia are natural: from decaying organic matter and from the excreta of humans and animals. Man-made sources (such as from the use of fertilisers and waste disposal sites or industrial processes) are smaller.

en.wikipedia.org/wiki/Urea_cycle

The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions that produces urea (NH 2) 2 CO from ammonia (NH 3).This cycle occurs in ureotelic organisms. The urea cycle converts highly toxic ammonia to urea for excretion. This cycle was the first metabolic cycle to be discovered (Hans Krebs and Kurt Henseleit, 1932), five years before the discovery of the TCA cycle.

www.epa.gov/wqc/aquatic-life-criteria-ammonia

Where does Ammonia Come From? Ammonia is produced for commercial fertilizers and other industrial applications. Natural sources of ammonia include the decomposition or breakdown of organic waste matter, gas exchange with the atmosphere, forest fires, animal and human waste, and nitrogen fixation processes.

www.waterboards.ca.gov/water_issues/programs/swamp/docs/...

Ammonia is also one of the most important pollutants because it is relatively common but can be toxic, causing lower reproduction and growth, or death. ... can also affect the amount of ammonia present. Ammonia can also come from domestic, industrial or agricultural pollution, primarily from fertilizers, organic matter or fecal matter.

www.livestrong.com/article/228000-what-are-the-causes-of...

Blood ammonia comes primarily from the bacterial breakdown of unabsorbed dietary protein in the intestine. Intestinal ammonia passes into the bloodstream and travels to the liver, which converts ammonia into urea. Urea subsequently passes from the body through the urine. High blood ammonia levels ...

purewateroccasional.net/wtiammonia.html

Ammonia is not regulated by current drinking water standards. Ammonia is toxic to fish and to dialysis patients. Its toxicity varies with the pH of the water. Although ammonia is an irritant to the respiratory tract, the limited number of studies that have been conducted show no long-term ill effects.