They are powerful living beings who unlike humans can exist in different realms with some belonging to the heavenly realms and some to either the animal or spirit realms. There are both beneficial and malevolent types.
Acronym for Distribution of Regional and Global and Oceanic Nitrous Oxide and Sulfur Hexafluoride, a NOAA CMDL program whose goal is to measure nitrous oxide and sulfur hexafluoride in flask samples from the CCG global flask network. The N O measurements are needed for better spatial resolution of sources and sinks as well as for improved overall growth estimates. The SF measurements are desired because of both the strong global warming potential (GWP) of the gas and its usefulness as a tracer for atmospheric transport studies. See the DRAGONS Web site.