Budapest Mayor Gergely Karácsony wrote a letter to 10,000 randomly selected Budapest residents to participate in the meeting.

An important aspect in the selection of applicants is that the group includes people who travel by public transport, by car, by bicycle or on foot. The volunteers will listen to expert lectures, discuss them in detail and develop proposals on how they would improve Budapest's air.

The recommendations of the assembly will be received by the mayor and the relevant professional leaders, the organizers will present their reports at the assembly, and the recommendations will be made to the public.