An article just published in the journal PNAS reports for the first time the emissions of three ozone-destroying compounds prohibited by the Montreal Protocol. The finding is based on data produced by a global network of 15 stations including the "Ottavio Vittori" climate observatory of Monte Cimone managed by the CNR Institute of Atmospheric Sciences and Climate. The networking of the measurements made it possible to ascertain that the increase in concentrations of these compounds is due to industrial emissions in East Asia.

On February 16th we received the sad news that Prof. Sergej Sergeevich Zilitinkevich passed away. Sergej was a giant in the field of boundary-layer meteorology, turbulence, fluid dynamics, in science at its highest level. We owe him many among the most brilliant ideas and developments in atmospheric scientific fields. Sergej was a leader, a maestro forever young, an enthusiastic researcher, a friend, a person really listening, a real scientist.

This Special Issue of Heritage encourages the submission of contributions presented at the 7th YOCOCU (Youth in Conservation and Cultural Heritage) Conference in Tbilisi (on-line edition), on 2nd–5th November 2020: "Hands on Heritage: Experiencing, Conservation, Mastering Management". This edition is devoted to experiences in learning and working on real-life scenarios in the realm of the conservation and management of cultural heritage. Therefore, research articles addressing the following (not exhaustive) list of topics are welcomed:

La comunità scientifica delle scienze dell&'atmosfera, della meteorologia e della climatologia si dà appuntamento dal 9 al 12 febbraio prossimo per il terzo Congresso di AISAM (Associazione Italiana di Scienze dell'Atmosfera e Meteorologia, di cui ISAC è socio collettivo) che si terrà interamente online, ospitato dalla piattaforma virtuale gestita dall'Università dell'Aquila e CETEMPS.