The CELLOPHAN project aims to acquire knowledge on the impact of secondary micro- and nanoplastic (MNP) emissions on airborne aerosol pollution, in work environments where there are processes/activities/production phases (hereinafter called "sources") that release MNP. This with the general objective of consolidating the scientific bases for the assessment of the risk from occupational exposure by inhalation to secondary MNP. The analytical strategy of the project will be divided into two years and is built on three specific objectives: (i) provide a methodology capable of characterizing the complete chemical-physical profile of MNP emissions (morphology, size, polymeric and elemental composition, size distribution, speciation of organic content); (ii) characterize different sources; (iii) identify and selectively quantify in real samples the contribution (particle and organic compound footprint) from MNP of the considered sources, with respect to the mix of aerosol components in the environment under study.