On September 13, 2021, «GRINCO» LLC hosted 15 students of «Refrigeration Economy» faculty of Armavir Regional State College, on September 22, 2021 15 students of Yerevan Regional College, and on 27 September, 2021 another 15 students from Ararat Regional State College under the framework of events dedicated to the International Day for the Preservation of the Ozone Layer.