CONTEXT OF THE NEWS

A recent study on Chennai’s beach sediments found that although overall microplastic levels are lower than global averages, the dominance of nylon fibres poses a serious ecological threat.

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BACKGROUND

• Microplastics are an emerging issue in:
  • GS Paper 3 (Environment & Pollution)
• Linked to:
  • Marine pollution
  • Human health risks
• Increasingly relevant due to:
  • Plastic waste crisis
  • SDG 14 (Life Below Water)

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NEWS BREAKDOWN

What are Microplastics?

Microplastics: Plastic particles less than 5 mm in size.

• Can be as small as:
  • Nanoplastics (<1 micrometer)

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Types of Microplastics

Type	Definition	Examples
Primary	Intentionally manufactured small plastics	Microbeads, Nurdles
Secondary	Breakdown of larger plastics	Bags, bottles, textiles

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Key Finding: Why Nylon is Dangerous

• Nylon fibres dominate Chennai sediments
• Risk depends on:
  • Polymer type
  • Shape
  • Aging properties
• Not just quantity, but toxicity matters more

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KEY CONCEPTS (IMPORTANT FOR UPSC)

1. Biomagnification

Biomagnification: Increase in concentration of toxins at higher levels of food chain.

• Microplastics:
  • Absorb pollutants
  • Transfer toxins to predators → Humans

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2. Plastisphere

Plastisphere: Microbial ecosystem formed on plastic surfaces.

• Acts as:
  • Breeding ground for bacteria
• Facilitates:
  • Antimicrobial Resistance (AMR)

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3. AMR (Antimicrobial Resistance)

• Bacteria develop resistance to antibiotics
• Microplastics accelerate gene exchange → “Superbugs”

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KEY CHALLENGES

1. Ecological Damage

• Marine organisms:
  • Mistake plastics for food
• Effects:
  • Digestive blockage
  • False satiety

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2. Human Health Risks

• Chemicals:
  • BPA, Phthalates
• Impacts:
  • Hormonal imbalance
  • Developmental issues
• Nanoplastics:
  • Cross:
    • Blood-brain barrier
    • Placenta

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3. Chemical Toxicity

• Microplastics are:
  • Hydrophobic (chemically sticky)
• Absorb:
  • DDT
  • Heavy metals

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4. Economic Impact

• Estimated loss:
  • USD 75 billion annually
• Affects:
  • Fisheries
  • Trade

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5. Detection & Removal Challenge

• Cannot be removed easily without:
  • Destroying marine ecosystems

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INITIATIVES TO TACKLE MICROPLASTICS

GLOBAL INITIATIVES

• UN Global Plastics Treaty (under negotiation)
• EU Ban on microplastics
• IMO marine litter strategy
• Global Plastic Action Partnership (GPAP)

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INDIA’S INITIATIVES

1. Plastic Waste Management Rules

• 2024 Amendment:
  • Defined microplastics (1–1000 microns)
• 2025 Amendment:
  • Mandatory QR codes for plastic tracking

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2. Extended Producer Responsibility (EPR 2.0)

EPR: Producers are responsible for post-consumer waste management

• Targets:
  • 40% recycled content by 2026–27
• Penalty:
  • Environmental Compensation

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3. National Plastic Pollution Reduction Campaign (2025)

• Focus:
  • Rural plastic waste
  • Soil microplastics

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MEASURES NEEDED

1. Product-Level Bans

• Ban:
  • Microbeads in cosmetics
• Promote:
  • Natural alternatives

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2. Industrial Controls

• Implement:
  • Zero Pellet Loss protocols
• Prevent:
  • Leakage of raw plastic pellets

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3. Technology & Standards

• Introduce:
  • Tertiary treatment in STPs
• Efficiency:
  • Removes ~99% microplastics

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4. Textile & Tire Regulation

• Reduce:
  • Synthetic fiber shedding
• Promote:
  • Natural fibers

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5. Governance Reform

• Include microplastics in:
  • Air Quality Standards (NAAQS)
  • Drinking Water Standards (BIS)

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6. Green Innovation

• Promote:
  • Biodegradable polymers
• Encourage:
  • Green chemistry startups

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PRELIMS FOCUS

• Microplastics size: <5 mm
• Nanoplastics: <1 micrometer
• EPR 2.0: Mandatory recycled content
• Plastisphere: Microbial layer on plastics
• Biomagnification: Toxin increase up food chain
• Nylon = high-risk polymer (as per study)

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CONCLUSION

India must shift from quantity-based monitoring to risk-based regulation, targeting high-impact microplastics and strengthening upstream interventions.

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PRELIMS CHECK

Question 1

Consider the following statements:

1. Microplastics are plastic particles smaller than 5 mm.
2. Primary microplastics are formed by breakdown of larger plastics.
3. Nurdles are raw plastic pellets.

Which of the statements given above are correct?

(a) 1 and 3 only
(b) 2 and 3 only
(c) 1, 2 and 3
(d) 1 only

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Question 2

With reference to microplastics, consider the following:

1. Biomagnification increases toxin concentration along food chains.
2. Plastisphere refers to plastic degradation process.
3. Microplastics can facilitate antimicrobial resistance.

Which of the statements given above are correct?

(a) 1 and 3 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3

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Question 3

Consider the following pairs:

Term	Description
1. EPR	Producer responsible for waste
2. SAM	Severe Acute Malnutrition
3. NAAQS	Water quality standards

How many of the pairs given above are correctly matched?

(a) Only one
(b) Only two
(c) All three
(d) None

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ANSWERS WITH EXPLANATION

Answer 1: (a) 1 and 3 only

• Microplastics <5 mm – Correct
• Primary are manufactured, not breakdown – Incorrect
• Nurdles are pellets – Correct

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Answer 2: (a) 1 and 3 only

• Biomagnification – Correct
• Plastisphere is microbial layer, not degradation – Incorrect
• AMR linkage – Correct

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Answer 3: (b) Only two

• EPR – Correct
• SAM – Correct
• NAAQS relates to air quality, not water – Incorrect

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“The smallest particles can create the biggest impact—protecting nature begins with mindful choices.”