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

Type Definition Examples Management
Biodegradable Broken down by microorganisms Food scraps, paper, leaves, cotton Composting, biogas
Non-biodegradable Cannot be broken down naturally (or takes centuries) Plastic, glass, metal, Styrofoam Recycling, landfill (last resort)
Hazardous waste Toxic, flammable, corrosive, reactive Batteries, chemicals, medical waste, pesticide containers Specialised treatment/disposal
E-waste Discarded electronic equipment Mobile phones, computers, TVs, batteries Authorised e-waste recyclers
Biomedical waste Waste from healthcare Used syringes, bandages, body fluids Incineration + autoclave
Construction & demolition waste Building debris Bricks, concrete, wood Crushing 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 is taller than the Qutub Minar (~65m) and continuing to grow
  • 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

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 targets 5,000 CBG plants by 2024

PART 3 — Frameworks

Circular Economy vs Linear Economy

Linear Economy Circular Economy
Take → Make → Use → Dispose Take → Make → Use → Recover → Make again
Waste is an end-product Waste is a resource for next cycle
Dependent on virgin materials Reduces raw material extraction
High waste generation Waste minimised at each stage

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

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

Previous Year 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)