This reprint includes the abstracts of talks and posters presented at the International Conference EcoBalt 2023 "Chemicals & Environment" on 9-11 October 2023, Tallinn, Estonia. During the two and a half days of this onsite event, close to 200 participants from 21 countries had a chance attend the presentations, which covered the topics of environmental chemistry and toxicology, ecology, analytical chemistry, green and sustainable chemistry, and the implications and applications of nanomaterials.