With 80,000 attendees, COP28 is largest UN climate summit ever

Until this year, those taking part were not obliged to say who they worked for, making it tricky to detect lobbyists and identify negotiators' potential conflicts of interest. Some 104,000 people, including technical and security staff, have access this year to the "blue zone" dedicated to the actual climate negotiations and the pavilions of the states and organisations present. That largely exceeds the previous record at last year's UN climate summit in Egypt, COP27, which had 49,000 accredited attendees...