Assessing the environmental impact of plastic flows in urban areas: A life cycle assessment and scenario analysis study

Abstract

Urban areas have a considerable impact on the environment. Among the sectors contributing to the environmental impacts is plastic product usage, resulting in urban plastic waste accumulation. There exists a need to determine and evaluate plastic flows and their environmental impacts in urban areas. Our research comprehended the modelling of the eight most commonly used plastic polymers in a system of a European city with 10^5 inhabitants for the year 2020. A scenario analysis was conducted, considering the European Union's policy of achieving a 65 % recycling rate by 2035. Plastic production contributes to most environmental impacts during the life cycle, where polyurethane, polystyrene and other plastic types are at the forefront. The results per waste management options revealed that recycling is still preferable for plastic waste, followed by incineration and landfill. Recycling potential was further noted during the scenario analysis, where an increased recycling fraction following the EU's policy could decrease the environmental impacts of global warming by a margin of 20 %–45 % and fossil resource scarcity by a margin of 20 %–52 % per individual plastic polymer. While the established model indicates potential benefits, improved data collecting, and further research are needed to improve the model and establish a plastic nexus within urban areas.