This course aims to provide training on the issue of contamination by plastic debris in our ecosystems, as well as alerting to the potential harmful effects on organisms. The course will consist of theoretical sessions on the origin and characterization of microplastics, terrestrial and aquatic contamination and the potential effects observed in different organisms, including humans. This information will be complemented using recent case studies carried out by the training team. Thus, this course is intended not only for researchers working with this issue, but also for decision-makers, teachers and the general public. The course's strategy is to train all interested parties with a scientific teaching approach, but with a simplicity of speech that allows communication with the target audience without specific training in chemistry and biology.