This gas, which is known as 'landfill gas', is both an asphixiant and, when mixed with the correct quantities of oxygen, an explosive hazard. From LearnThat.org. [http://www.waste-management-world.com/articles/print_screen.cfm?ARTICLE_ID=273055]
Although argon is non-toxic, it does not satisfy the body's need for oxygen and is thus an asphyxiant. From Wordnik.com. [Argon] Reference
An unusual application is as an asphyxiant in the poultry industry, either for mass culling following disease outbreaks, or as a means of slaughter more humane than the electric bath. From Wordnik.com. [Argon] Reference
Toxicologically, methane is classified as a simple asphyxiant. From Wordnik.com. [ScienceBlogs Channel : Life Science] Reference
I guess there is more than one way for methane to become an asphyxiant. From Wordnik.com. [ScienceBlogs Channel : Life Science] Reference
However, when methane is present at high concentrations, it acts as an asphyxiant. From Wordnik.com. [OpEdNews] Reference
The gas is also an asphyxiant that can reduce the oxygen in the air, causing suffocation. From Wordnik.com. [post-gazette.com - News] Reference
It is a simple asphyxiant in significant concentrations, and it does that by definition of asphyxiation. From Wordnik.com. [Watts Up With That?] Reference
Coal-bed methane is a two-fisted safety risk to miners because it's an asphyxiant and is highly explosive when mixed with photo: Creative Commons/Medicaster. From Wordnik.com. [WN.com - Articles related to Solar energy complex could hurt tortoises] Reference
Then you must keep it under pressure and hope that it doesn't migrate through cracks in the earth, create pools of an invisible, odorless asphyxiant, trigger earthquakes, or damage freshwater drinking supplies. From Wordnik.com. [The Somerville News Blog] Reference
Try a complex asphyxiant. From Wordnik.com. [ScienceBlogs Channel : Life Science] Reference
Nitrous oxide is a simple asphyxiant. From Wordnik.com. [Latest Articles] Reference
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