Recital 26

(26)Ozone is a transboundary pollutant formed in the atmosphere from the emission of primary pollutants. Some of those atmospheric pollutants are addressed by Directive (EU) 2016/2284 of the European Parliament and of the Council ⁹ . Ground-level ozone adversely affects not only human health but also vegetation and ecosystems. Progress towards the target values and long-term objectives for ozone set in this Directive should be determined by the targets and emission reduction commitments provided for in Directive (EU) 2016/2284 and by implementing cost-effective measures, air quality roadmaps and air quality plans where appropriate.