e/Reduced gas

Information
has gloss	eng: A reduced gas is a gas with a low oxidation number (or high reduction), and is usually hydrogen-rich. Strongly reduced gases include methane, ammonia, and hydrogen sulfide.
lexicalization	eng: reduced gas
instance of	(noun) a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe H, hydrogen, atomic number 1