Researchers seeking to chart a course toward a plastic-free future have warned the accumulation and poor management of plastic fibres and particles is having serious consequences for both human health and environmental sustainability.

The team behind the study which are affiliated with Lahore College for Women University, Central Queensland University, University of Sharjah, University of Karachi, and the Environment and Protected Areas Authority in the UAE, present a sobering assessment of the threats micro- and nano-plastics (MNPs) pose to both human health and the environment

They added the research offers “a holistic review” of microplastic accumulation and management, with a focus on land and environmental sustainability.

The authors highlighted the significance of micro- and nano-plastics (MNPs), plastic particles or fibres ranging in size from nanometres to less than 5 millimetres, which are increasingly recognised as pervasive environmental pollutants.

“The accumulation and mismanagement of MNPs is concluded as a significant global problem in this review and it poses substantial negative impacts on human health and environmental sustainability,” the study explained. “Effective strategies to mitigate MNP pollution demand circular economy approach that can reduce plastic production and consumption, promoting reuse and mechanical recycling over valorisation and chemical recycling and adopting robust, sustainable waste management.”

The review paper offers a comprehensive analysis of the challenges and opportunities associated with managing micro- and nano-plastics within ecosystems.

It emphasised the ecological impact of MNP contamination on soil–plant systems and its broader implications for individual health. The review explores how MNPs interact with living organisms, detailing their accumulation mechanisms in soil environments, their interactions with potentially toxic elements (PTEs), and the resulting risks of soil toxicity.

Additionally, it examined the effects of MNPs on crop health and the potential human health risks linked to the consumption of plants contaminated with these particles.

It highlighted that more than 300 million tons of plastic are produced annually, of which approximately 50% is intended for single-use applications. They add that due to its extreme resistance to decomposition, often persisting for over a thousand years, plastic waste is widely mismanaged across the globe.

Plastic particles accumulate across landfills, water bodies, agricultural systems, such as mulching films and biofilms, and even in the atmosphere. This widespread presence underscores the growing severity of plastic pollution as a global environmental challenge.

This buildup, they say, is evident in landfills, water bodies, agricultural settings, such as mulching films and biofilms, and even in the air. As a result, plastic pollution has emerged as a major and increasingly urgent global environmental challenge, they maintain.

The study highlights that the presence of the bioaccumulation of micro- and nano-plastics in freshwater and marine ecosystems, along with their ingestion by various life forms, can contribute to declining health outcomes.

It underscores the need for developing appropriate infrastructure, promoting waste valorisation, and implementing cost-effective strategies for plastic waste management. It also proposes practical solutions to reduce plastic pollution in the environment.

“In food chains, MPs pose risks to human health, with significant ingestion from contaminated sources potentially leading to oxidative stress and physiological disturbances in both humans and marine wildlife,” The team explained. “Repurposing plastic waste in construction enhances material properties and reduces environmental impact. Additionally, activated carbon from plastic waste shows strong pollutant adsorption capabilities, aiding environmental remediation.”

To stave off the risks, the study calls for the adoption of effective measures to mitigate the adverse impact of plastic particles and fibres on human health and the environment.

“Microplastics (MPs) interact with heavy metals, affecting plant biomass and chlorophyll levels – likely due to reduced metal bioavailability and shifts in microbial populations,” the authors added. Within food chains, they say, MPs pose significant risks to human health, as ingestion from contaminated sources may lead to oxidative stress and physiological disturbances in both humans and marine organisms.