Ghost Emissions?

Airlines are reportedly maintaining near-empty 'ghost flights' to retain their EU airport slots (https://www.theguardian.com/environment/2022/jan/26/airlines-flying-near-empty-ghost-flights-to-retain-eu-airport-slots). 'Ghost flights', in spite of carrying few passengers, will still pump masses of 'greenhouse gases' high into the atmosphere. The airlines are clearly committed to net zero carbon emissions rather than simple profits!