On September 17, 2022, World Cleanup Day is organized globally. This civic movement brings together millions of volunteers, governments and organizations from 191 countries worldwide to tackle the global waste problem and build a new and sustainable world. This year, the European Researchers' Night project in Moldova joins the World Cleanup Day movement. We invite volunteers to join us on September 16-17, 2022 in helping to clean the rivers banks of Bac river in Chisinau and Raut river in Balti. Date, time and place of meeting: Chisinau: 16.09.2022, 2:00 p.m., Northern Railway station of