Plastic entries into the environment are an increasingly discussed issue. In the project, a first estimation of plastic entries into the environment from littered plastic items as well as plastic applications has been made. Based on this, the most relevant sources could be identified and possible mitigation actions have been discussed. Major emissions result from the transportation sector with tyre wear as key source. In addition, the construction sector as well as the agriculture and horticulture sectors contribute significantly. Besides the quantification of entries from various sources, the data situation has been critically assessed and key points for improving the data situation have been identified. Finally, results from this study have been cross-checked with findings from related recent studies.