Nitrogen trifluoride is a chemical compound made up of nitrogen and fluorine atoms. It is often used in everyday products like computer chips and flat-screen televisions to clean them when they are being manufactured. Full definition
The concentration of nitrogen trifluoride in the atmosphere is about 0.5 part per trillion, making it very hard to measure. (scientificamerican.com)
Other greenhouse gases are also worrying [including methane, which has started to rise again, and even gases such as nitrogen trifluoride, though the extent of this as a problem remains quite controversial] (bravenewclimate.com)
-- For a covered entity described in section 700 (13)(C), 1 emission allowance for each ton of carbon dioxide equivalent of fossil fuel - based carbon dioxide, nitrous oxide, or any other fluorinated gas that is a greenhouse gas (except for nitrogen trifluoride), or any combination thereof, produced or imported by such covered entity during the previous calendar year for sale or distribution in interstate commerce. (congress.gov)