Noble Metal
Chemically inactive metal such as gold; does not corrode easily.
Noise ...
noble metal : Chemically inactive metal (such as gold). A metal that does not corrode easily and is much scarcer (and more valuable) than the so-called useful or base metals. Also see base metal.
Gas enters the unit and passes over a support material coated with a catalyst (commonly a noble metal such as platinum or rhodium) that promotes oxidation of the organics. Catalytic oxidizers can also be very effective in controlling odors.
inert material A material that is not very reactive, such as a noble metal, plastic, or cement.
Noble Metal
Noise
Non-Binding Allocations of Responsibility (NBAR)
Non-ionizing Electromagnetic Radiation
Non-Aqueous Phase Liquid (NAIL)
Non-Attainment Area
Non-Community Water System
Non-Compliance Coal
Non-Contact Cooling Water ...
 See also: Air, Hazard, Liquid, Waste, Pollutant
  
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