Microplastics in India’s agriculture: A growing problem demanding urgent action
A new roadmap by NAAS emphasises national monitoring, improved waste management, and biodegradable alternatives to combat the growing crisis due to microplastics.
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Context
The (NAAS) recently released a comprehensive report highlighting the escalating threat of microplastic pollution in Indian agriculture. Despite a low per capita plastic consumption, India generates roughly 26 million tonnes of plastic waste annually, with a significant portion entering ecosystems. The report warns of severe implications for soil health, crop productivity, and human well-being, urging an immediate and dedicated policy framework.
UPSC Perspectives
Environmental
From a UPSC GS-3 perspective, understanding the ecological footprint of microplastics (plastic fragments smaller than 5 mm) is crucial. These particles originate from the breakdown of macroplastics and heavily contaminate agricultural soils, where they alter physical and chemical properties. The report notes that microplastics act as vectors for (POPs) such as polychlorinated biphenyls (PCBs), amplifying soil toxicity. Furthermore, they accelerate the microbial decomposition of organic matter, paradoxically increasing carbon dioxide emissions from soils. The also observed that major river systems like the are massive conduits, discharging around 0.12 million tonnes of plastic annually into coastal zones, thereby threatening marine and riverine biodiversity. Candidates should note how microplastic pollution bridges terrestrial and aquatic environmental degradation.
Governance
Analyzing the regulatory landscape reveals significant policy gaps in tackling this microscopic threat. India currently regulates plastic waste primarily through the , which successfully initiated a ban on select single-use plastics starting in 2022. However, this framework lacks specific provisions, standardized detection protocols, and a centralized monitoring strategy tailored for microplastics. The NAAS report recommends aligning microplastic mitigation with existing urban and sanitation initiatives like the and to leverage existing infrastructure for improved wastewater treatment and waste segregation. To write an effective Mains answer, aspirants must emphasize that transitioning from macro-level bans to micro-level regulation requires systemic upgrades, including membrane filtration in sewage treatment plants and robust Extended Producer Responsibility (EPR) compliance.
Agricultural
The intersection of modern farming practices and microplastic accumulation is a highly probable focus area for UPSC Mains. Agricultural techniques such as plastic mulching (using plastic sheets to retain soil moisture) and irrigation with poorly treated wastewater directly introduce microplastics into the soil profile. Through physical processes like tillage and wet-dry cycles, these fine particles penetrate deeper soil layers, rendering bioremediation efforts highly complex. Biologically, microplastics induce oxidative stress and hormonal imbalances in plants, directly reducing seed germination and nutrient uptake. This establishes a direct pathway from soil to plate, highlighting the urgent need for a One Health approach. By migrating into the food chain, these polymers trigger gastrointestinal and endocrine issues in humans, underlining the necessity to promote biodegradable alternatives like bamboo and cellulose in farm inputs.