Note: This chapter was removed from the NCERT curriculum in the 2022 rationalization. It is retained here because waste management — solid waste, plastic waste, e-waste, composting — is a major UPSC GS3 and GS2 topic linked to Swachh Bharat Mission, extended producer responsibility, and the circular economy.

Why this chapter matters for UPSC: India generates ~1,50,000 metric tonnes of municipal solid waste (MSW) daily. Waste management — collection, segregation, composting, recycling — and associated policy (Solid Waste Management Rules 2016, Plastic Waste Management Rules, E-Waste Rules) are consistently tested.

PART 1 — Quick Reference Tables

Types of Waste

TypeDefinitionExamplesManagement
BiodegradableBroken down by microorganismsFood scraps, paper, leaves, cottonComposting, biogas
Non-biodegradableCannot be broken down naturally (or takes centuries)Plastic, glass, metal, StyrofoamRecycling, landfill (last resort)
Hazardous wasteToxic, flammable, corrosive, reactiveBatteries, chemicals, medical waste, pesticide containersSpecialised treatment/disposal
E-wasteDiscarded electronic equipmentMobile phones, computers, TVs, batteriesAuthorised e-waste recyclers
Biomedical wasteWaste from healthcareUsed syringes, bandages, body fluidsIncineration + autoclave
Construction & demolition wasteBuilding debrisBricks, concrete, woodCrushing and reuse

Waste Management Hierarchy (Preferred Order)

  1. Reduce — produce less waste (best option)
  2. Reuse — use items multiple times
  3. Recycle — convert waste into new materials
  4. Recover energy — incinerate waste to generate electricity (Waste-to-Energy)
  5. Dispose — landfill (last resort; worst option)

PART 2 — Detailed Notes

India's Solid Waste Challenge

UPSC Connect

UPSC GS3 — Solid Waste Management:

Scale:

  • India generates ~1,50,000 MT/day of MSW (Municipal Solid Waste)
  • Only ~70% collected; ~30% not collected at all → dumped in open spaces
  • Of collected waste, only ~20% treated/processed; rest goes to landfills or is dumped
  • Urban India has ~3,000 garbage dumpsites; most are unscientific "open dumps," not engineered landfills

Swachh Bharat Mission (SBM, 2014):

  • Phase 1 (2014-19): Focus on ODF (Open Defecation Free) — 10.28 crore toilets built; 6.06 lakh villages declared ODF
  • Phase 2 (SBM-Urban 2.0 and SBM-Gramin 2.0, 2021-26): Focus on solid and liquid waste management, ODF Plus (sustainable ODF), faecal sludge management
  • Three-bin system: Green (wet/biodegradable), Blue (dry/recyclable), Black (hazardous) — mandated in SBM cities
  • Solid Waste Management Rules 2016: Mandatory source segregation; Extended Producer Responsibility (EPR) for packaging; bulk waste generators must manage own waste

Landfill crisis:

  • Delhi has 3 major landfills (Bhalswa, Ghazipur, Okhla) all over capacity; Ghazipur landfill peaked at ~65 m — 8 metres shorter than the Qutub Minar (72.5 m); now being reduced through biomining (~53 m as of 2024)
  • Landfill fires release toxic dioxins and furans; leachate contaminates groundwater
  • Biomining: Excavating old landfills, separating materials for reuse/recycling, and remediating the land — being done at Ghazipur, Bhalswa

15th Finance Commission: Allocated ₹26,000 crore to Urban Local Bodies (ULBs) specifically for solid waste management.

Plastic Waste

Explainer

India's plastic crisis:

  • India generates ~4 million tonnes of plastic waste annually (~2023)
  • ~40% uncollected; much enters rivers → Bay of Bengal and Arabian Sea
  • India is one of the top 10 plastic polluters of oceans globally

Single-use plastic ban:

  • Single-Use Plastic (SUP) ban (July 1, 2022): 19 categories of SUP banned — earbuds, balloon sticks, plastic flags, candy sticks, ice cream sticks, polystyrene (thermocol), plastic cutlery, straws, trays, stirrers, plastic bags < 75 micron thickness. (No new categories added as of 2026; enforcement and EPR compliance is the current focus)
  • 2025 EPR update: From July 1, 2025, mandatory QR code/barcode traceability on all plastic packaging; rigid plastic packaging must include 30% recycled content (rising to 60% within 3 years)
  • Plastic Waste Management Rules (amended 2022): Extended Producer Responsibility (EPR) — manufacturers, importers, and brand owners responsible for collecting back the plastic they put into market

Microplastics:

  • Plastic that has broken into tiny fragments < 5mm
  • Found in oceans, soil, drinking water, human blood, breast milk, placentas
  • No effective way to remove once in environment — an irreversible chemical/physical change
  • UPSC GS3 frequently tests microplastic pollution

[Additional] Global Plastics Treaty — UNEA Mandate:

  • UN Environment Assembly (Nairobi, March 2022) adopted resolution to negotiate a legally binding global plastics treaty covering full lifecycle of plastics (production, design, waste management)
  • INC-5 (Busan, South Korea, Nov 2024): Negotiations failed to reach agreement; divisions between oil-producing nations (wanting to focus only on waste management) and high-ambition nations (wanting production cuts)
  • INC-5.2 (Geneva, Jan 2026): Resumed session; still no consensus; negotiations continuing. India's position: supports the treaty but emphasises differentiated responsibilities and right to development. Multilateral environmental agreement of historic potential for plastics.

E-Waste

Explainer

E-waste (Electronic waste):

  • India is the 3rd largest generator of e-waste globally — domestic generation: 1.751 million MT in 2023-24 (MeitY; up 73% in 5 years); broader UN/ITU methodology estimates ~3.8 million MT
  • Contains valuable metals (gold, silver, copper, palladium) AND toxic materials (lead, mercury, cadmium, chromium)
  • E-Waste Management Rules (amended 2022): EPR framework; authorised recyclers only; collection targets; Producer Responsibility Organisation (PRO) system
  • Urban mining: Extracting precious metals from e-waste — more cost-effective than traditional mining for gold, silver; reduces import dependence
  • Informal e-waste recycling (in Delhi's Seelampur; Mumbai's Dharavi) exposes workers to toxic chemicals without protection

Composting and Biogas

Explainer

Composting: Biodegradable waste + microorganisms (bacteria, fungi) + moisture + air → compost (organic fertiliser).

  • Reduces landfill burden
  • Returns nutrients to soil (carbon, nitrogen, phosphorus)
  • Vermicomposting: Using earthworms to accelerate composting; produces high-quality compost; promoted under PM KUSUM and organic farming schemes

Biogas:

  • Organic waste (food, dung, crop residue) → anaerobic digestion (without oxygen) → biogas (mainly methane CH₄) + digestate (organic fertiliser)
  • Gobar-Dhan Yojana (Galvanising Organic Bio-Agro Resources Dhan): Converts cattle dung and agricultural waste to biogas and organic compost; reduces open burning and methane emissions from waste
  • 15th FC grants include funding for biogas plants in villages
  • Compressed Bio-Gas (CBG): Purified biogas as vehicle fuel; SATAT (Sustainable Alternative Towards Affordable Transportation) scheme originally targeted 5,000 CBG plants by 2023-24 — the target was massively missed; only ~108 plants operational as of July 2025 (1,094 letters of intent issued); government has revised expectations to ~750 plants by 2028

PART 3 — Frameworks

Circular Economy vs Linear Economy

Linear EconomyCircular Economy
Take → Make → Use → DisposeTake → Make → Use → Recover → Make again
Waste is an end-productWaste is a resource for next cycle
Dependent on virgin materialsReduces raw material extraction
High waste generationWaste minimised at each stage

India's National Resource Efficiency Policy (NREP, 2019) and the SUP ban are steps toward circular economy.

[Additional] 16a. Waste-to-Energy Plants — Burning Waste for Electricity

The chapter lists "Recover energy" in the waste hierarchy but gives no explanation. Waste-to-Energy (WtE) plants combust municipal solid waste to generate electricity — India has several operational plants, but the sector is controversial.

UPSC Connect

[Additional] India's Waste-to-Energy (WtE) Plants — GS3 (Waste Management/Energy):

How WtE works: Municipal solid waste is burned at high temperatures (~800–1000°C) in a controlled combustion chamber → heat converts water to steam → steam drives turbines → electricity generated. Remaining ash (~27–40% of waste weight) requires disposal.

India's WtE sector (as of 2025):

  • As of November 2022 (latest PIB count): 12 operational WtE plants across 10 states; the high closure/non-operational rate (several plants shut after commissioning) reflects the sector's challenges
  • Total waste-based power installed capacity: ~840 MW (MNRE, March 2025) — includes MSW, industrial waste, and other waste-based power

Major WtE plants:

  • Okhla WtE Plant (Delhi): 23 MW capacity; processes ~1,800 TPD of MSW; has processed over 6 million metric tonnes total; operated by Timarpur-Okhla Waste Management Company (TOWMCL/Jindal group)
  • Ghazipur WtE Plant (Delhi): 12 MW capacity; located next to Ghazipur landfill; processes 700–1,000 TPD; has struggled financially
  • Moshi WtE Plant (Pimpri-Chinchwad/Pune): RDF (Refuse Derived Fuel) based; operational since October 2023; generated 16.66 crore units of electricity by mid-2025

Why WtE is controversial:

  1. Dioxin and furan emissions: CPCB inspections found the Okhla plant releasing dioxins at levels far above permissible limits — these are highly toxic persistent organic pollutants that cause cancer and endocrine disruption
  2. Ash disposal problem: WtE bottom ash contains heavy metals (lead, mercury, cadmium) — proper disposal is critical but often not done
  3. Conflict with recyclers and EPR: The same waste that could be recycled (recovering materials and jobs) is incinerated. Recycling creates 6–10 times more jobs than incineration; burning recyclable material destroys resources. EPR targets require producers to take back and recycle packaging — WtE burns this material instead
  4. High cost: WtE electricity costs more than grid electricity; plants require long-term power purchase agreements and gate fee subsidies to be viable
  5. Waste hierarchy violation: Under the SWM Rules 2016 and waste hierarchy, incineration should be used only for non-recyclable, high-calorific waste fractions (5–10% of total MSW) — not as a primary solution

Important distinction: MNRE's National Bioenergy Programme CFA (Central Financial Assistance) does NOT fund MSW incineration or pyrolysis plants — only biological conversion (biogas/Bio-CNG from organic waste) is eligible.

[Additional] 16b. Landfill Gas — Methane from Dumps

Landfills are a major but overlooked source of greenhouse gas emissions in India. When biodegradable waste decomposes underground without oxygen (anaerobic decomposition), it produces landfill gas (LFG) — mainly methane.

Key Term

Landfill Gas (LFG) facts:

  • Composition: ~50% methane (CH₄) + ~50% CO₂ (plus trace gases like hydrogen sulphide)
  • Methane is ~80 times more potent a greenhouse gas than CO₂ over 20 years (IPCC AR6: 20-year GWP = 80.8); over 100 years, GWP = ~28
  • This means every tonne of landfill methane emitted is equivalent to 80 tonnes of CO₂ for climate impact in the near term

India's landfill methane problem:

  • ~70–90% of India's waste dumps are unscientific open dumpsites with no LFG capture — methane simply vents to the atmosphere
  • Indian MSW contains ~50% biodegradable matter → very high methane generation potential
  • India hosts some of the world's largest methane-emitting landfills: Satellite data (2025) identified Secunderabad and Mumbai (Deonar) among the world's 25 largest methane-emitting landfill sites
  • Deonar Dumping Ground (Mumbai): India's oldest active landfill (established 1927); receives ~3,700+ MT/day; produces ~6,202 kg of methane per hour (CPCB 2024); major fires in 2016 and 2018 released dioxins and pushed AQI to "Severe" (435+) across Mumbai

LFG capture — missed opportunity:

  • Engineered landfills drill wells to collect LFG → can generate electricity or be purified to Bio-CNG
  • The uncaptured methane from Indian landfills represents a massive lost climate mitigation and energy recovery opportunity
  • Ghazipur landfill (Delhi): biomining ongoing; completion target pushed to 2028; fresh waste still arriving at 2,400–2,600 TPD daily despite the landfill's infamous height of 65 metres

Exam Strategy

Prelims traps:

  • Single-use plastic banned items: 19 categories from July 1, 2022 — NOT all plastic bags (bags above 75 micron are allowed)
  • India's rank in e-waste: 3rd largest generator globally (after China and USA)
  • Biogas composition: Mainly methane (CH₄) — NOT hydrogen; different from hydrogen fuel cells
  • Gobar-Dhan: Dung + agricultural waste → biogas + compost (NOT just electricity)
  • Composting = aerobic (with oxygen); Biogas = anaerobic (without oxygen) — frequently confused

Mains connections:

  • SBM Phase 2 + ODF Plus + FSSM
  • EPR framework for plastic and e-waste
  • Circular economy + waste-to-energy + urban mining

Practice Questions

Prelims:

  1. India banned 19 categories of single-use plastics from:
    (a) January 1, 2020
    (b) October 2, 2021
    (c) July 1, 2022
    (d) April 1, 2023

  2. India is the world's third largest generator of which type of waste?
    (a) Nuclear waste
    (b) Plastic waste
    (c) E-waste (electronic waste)
    (d) Agricultural waste

  3. Gobar-Dhan Yojana is primarily associated with:
    (a) Cow protection
    (b) Soil conservation
    (c) Converting cattle dung and agricultural waste to biogas and compost
    (d) Organic farming certification

  4. Which of the following is the correct waste management hierarchy (most preferred to least preferred)?
    (a) Reduce → Reuse → Recycle → Recover energy → Dispose
    (b) Recycle → Reuse → Reduce → Recover → Dispose
    (c) Dispose → Recover → Recycle → Reuse → Reduce
    (d) Reuse → Reduce → Recycle → Dispose → Recover

Mains:

  1. Discuss the challenges of solid waste management in India's cities. How do Swachh Bharat Mission Phase 2 and the Extended Producer Responsibility framework address these challenges? (GS3, 15 marks)