Detection of Inhalable Microplastics in Major Indian Cities

Last Updated: 2025-12-19 - A groundbreaking study published in Environment International has detected inhalable microplastics in the air of major Indian cities, revealing a critical gap in current Air Quality Index (AQI) frameworks. This discovery is significant for UPSC aspirants, particularly for General Studies (GS) Papers 1 and 3, as it highlights an emerging environmental and health issue.

Key Facts About Inhalable Microplastics

• Inhalable microplastics are airborne particles smaller than 10 micrometres (µm).
• They remain suspended in the air, posing inhalation risks.
• Common sources include synthetic clothing, tire wear, and waste burning.
• Major air pollutants include PM2.5, SO₂, NO₂, CO, O₃, Pb, and NH₃.
• Inhalable microplastics are significant urban air pollutants.
• They carry toxic co-pollutants like heavy metals and endocrine disruptors.
• Delhi and Kolkata show higher levels of inhalable microplastics.
• Urban residents inhale about 132 µg of microplastics daily.
• Most particles come from tire wear and plastic packaging.
• Microplastics can penetrate deep into the lungs.
• They increase risks of hormonal disorders and cancer.
• Microplastics are smaller than 5 mm, while nanoplastics are below 100 nanometres.
• Types include primary (commercial use) and secondary (degradation of larger plastics).
• Major sources are synthetic clothing, single-use plastics, and personal care products.
• India has regulations like the ban on single-use plastics and the India Plastics Pact.
• The study emphasizes the overlooked health risks of inhalable microplastics in urban air.

India's Urban Air Pollution Challenge

The detection of inhalable microplastics in Indian cities underscores the broader challenge of urban air pollution, which is a significant barrier to achieving India's health and environmental goals. With cities like Delhi and Kolkata already grappling with high pollution levels, this new dimension adds urgency to addressing air quality comprehensively. India's air pollution ranks among the highest globally, affecting economic productivity and public health.

Related Government Schemes/Policies

• Ban on Single-Use Plastics: Prohibits the use of certain plastic products to reduce pollution.
• India Plastics Pact: A collaborative initiative to promote sustainable plastic use.

UPSC Relevance

• GS Paper 1: Urbanization, their problems and their remedies.
• GS Paper 3: Environmental pollution and degradation; Environmental impact assessment.
• Prelims Angle: Questions on air pollutants, microplastics, and related health impacts.
• Mains Angle: Analytical themes on urban pollution, health impacts, and policy measures.

FAQ Section

• What are inhalable microplastics? Inhalable microplastics are tiny plastic particles smaller than 10 micrometres that can be suspended in the air, posing health risks when inhaled.
• Why is the detection of inhalable microplastics important? It highlights a critical gap in current air quality assessments and poses significant health risks, including respiratory issues and hormonal disorders.
• What are the key features of the study on inhalable microplastics? The study found that urban residents inhale about 132 µg of microplastics daily, with significant sources being tire wear and plastic packaging.