It is our pleasure to welcome You all the participants of the virtual Scientific seminar „ECOLOGICAL CHEMISTRY ENSURES A HEALTHY ENVIRONMENT”, organized by the Laboratory of Ecological Chemistry, Institute of Chemistry, Chisinau. The current event is dedicated to the 50th anniversary from the founding of the Laboratory of Mineral Resources and Water Chemistry, 30 years since organization of the Laboratory of Ecological Chemistry and commemoration of the remarkable chemist and ecologist, doctor Valeriu ROPOT (20 years of upon passing away). The main aim of the seminar is active promoting in society of the scientific results obtained in the field of ecological chemistry, environmental protection and population health. The seminar is addressed to a broad circle of researchers, including young licence, master and PhD students from different fields with tangential activities to the topics of the seminar and also to specialists from research and development areas of enterprises / organizations with a profile in environmental protection. We are delighted to announce participation of distinguished colleagues from national and international research institutions and laboratories who kindly accepted our invitation to provide oral presentations. We express our gratitude and appreciate your contributions.