A seven-year citizen science study with schoolchildren on German riversides found stable litter density, mainly plastic and cigarette butts, with wider rivers showing higher litter levels, stressing the need for policy action.

This article illustrates the communication strategies that were successfully applied in the citizen science program Plastic Pirates in Germany. The program engages schoolchildren, teachers and youth groups in plastic pollution research. A variety of communication strategies have been implemented and continuously revised and adapted since the start of the program in 2016.

This article, co-authored by Mandy Hinzmann and Linda Mederake from Ecologic Institute, assesses the potential of the EU "Single-Use Plastics Directive" (SUPD) to reduce litter pollution in the environment with three scenarios. The scenario analysis revealed that the success the current SUPD can be an important first step, yet further legislative actions are needed to effectively prevent plastic waste pollution - bans alone are not sufficient. The success of the Directive is therefore highly dependent on implementation and enforcement.

The "Plastic Pirates" are a citizen science project for young people to research litter pollution in German rivers. The article describes the background and objectives of the project, explains the scientific methodology and presents some of the results from the first years of the project.

How much and what kind of waste is found on European riverbanks? Are microplastics floating in our river towards the open sea? What measures could reduce the presence of single-use plastic items in the environment? These are just some of the questions that young people are exploring together with scientists in the citizen science project "Plastic Pirates - Go Europe!". The aim of the project is a wide-ranging, scientific survey of litter pollution along European watercourses and the identification of potential litter hotspots.