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Microplastics and Nanoplastics in Soil
Summary
This review synthesizes current knowledge on microplastic and nanoplastic contamination in soils, covering sources including agricultural films, compost, and atmospheric deposition, as well as their effects on soil organisms and ecosystem functions. The authors identify key research priorities for understanding long-term soil health impacts.
Microplastics and nanoplastics are major environmental hazards that have permeated many ecosystems, including soil. There is increasing interest and worry about the possible effects of these tiny plastic particles on plant life and, by extension, global food security as they build up in the soil. Research has indicated that plant roots have the ability to absorb microplastics and nanoplastics, which can then cause them to translocate and accumulate in various plant tissues. This phenomenon raises concerns about the possible influx of plastics from plants into the human food chain, which could have an impact on the security and safety of food. The intricate interplay among soil attributes, plant physiology, and plastic qualities is responsible for the variation in absorption and accumulation rates among distinct plant species. The effects of microplastic and nanoplastic absorption by plants on food security are complex. On the one hand, these particles may obstruct the uptake of water and nutrients, which could stunt plant development and reduce production. However, the possibility that plastics will find their way into plant portions that humans can eat raises questions about the security of our food supply. Furthermore, the situation is made worse by the fact that plastics are persistent in the environment and can accumulate over time to have cumulative effects on both human populations and terrestrial ecosystems. Policymakers, agronomists, and environmental scientists must collaborate on multidisciplinary research projects to address the problem of microplastics and nanoplastics in soil. Improved waste management, the creation of biodegradable substitutes, and sustainable farming methods targeted at lowering soil plastic pollution are some strategies to lessen the negative effects of plastics on plant health and food security. The intricate relationships between soil, plants, and microplastics and nanoplastics can be better understood and addressed in order to create a more stable and reliable global food chain.