Plasticizing the Biosphere: a Multidimensional Assessment of Synthetic Plastic Pollution and Ecosystem Health

Abstract Synthetic plastics have become integral to modern society because of their durability, versatility, and low production cost; however, their persistence has created a growing threat to ecosystem health. Plastic pollution is no longer confined to visible waste but has expanded into microplastic and nanoplastic contamination across terrestrial, freshwater, marine, atmospheric, and biological systems. This paper presents a multidimensional assessment of the impacts of synthetic plastic pollution on the biosphere, focusing on aquatic ecosystems, terrestrial and soil environments, biodiversity, microorganisms, plants, food webs, and interactions with other environmental contaminants. The study highlights how plastic waste fragments and moves through the environment, increasing the potential for ecological exposure and biological interaction. The paper focuses on the effects of microplastics on soil properties, microbial communities, aquatic organisms, and ecosystem processes. The paper also examines the relationship between plastic pollution and climate change through the plastics lifecycle, from resource extraction and production to consumption and waste management. The findings emphasise that plastic pollution represents a systemic environmental challenge rather than a conventional waste-management problem. Effective mitigation requires reducing unnecessary plastic consumption, improving waste-management systems, promoting reuse and recycling, designing safer materials, controlling microplastic emissions, and strengthening circular-economy approaches. The paper concludes that protecting ecosystem health requires coordinated interventions across the entire plastics lifecycle, supported by standardised monitoring, interdisciplinary research, and sustainable production and consumption practices.