As a rule, too many people cram in there, and concentrated smoke spreads to adjacent areas. From the New Year, smoking will only be allowed outside, beyond the airport building.
In turn, the administration of the Danish air gateway assures that this will not create major problems for smokers, as the outdoor smoking areas will become more convenient, and both arriving passengers after collecting luggage and departing passengers before security checks will be able to get there. However, transit passengers between flights will no longer be able to smoke.
As Travel.ru notes, this practice is in effect at most European airports, as Europe is actively campaigning against smoking. According to Kastrup Airport administration, most passengers approve of this initiative.