International Effort Brings an Open Standard For Docking In Space
FTL writes "Engineers from the US, Russia, Japan, Canada and Europe have come together to publish an International Docking Standard for spaceships. Currently the space station has three different types of incompatible docking ports, and the Chinese are developing their own. Standardizing on one type would permit interoperability and facilitate emergency rescues."
N2 is rather inert, and (along with high-quality flue gas, the noble gasses, and various N2/noble gas mixtures) is often referred to as an "inert gas". Perhaps you're confusing "inert gas" with "noble gas", or perhaps you slept through high school chemistry.