Methane Emissions from Landfills: A Hidden Climate Threat
Table of Contents
Source: The Hindu
Relevance:
GS Paper 3: Conservation, Environmental Pollution & Degradation, Climate Change
Important Key Concepts for Prelims and Mains:
For Prelims:
- Methane (CH₄), Global Warming Potential (GWP), Landfill methane, Satellite monitoring, Global Methane Pledge, IMEO, CarbonMapper, ClimateTRACE
For Mains:
- Landfill methane emissions, Urban waste management and climate change, Role of satellite technology in environmental governance, Data-driven climate action
Why in News?
Satellite observations reveal that methane emissions from Indian landfills are far higher than official estimates, posing a serious challenge to India’s climate goals, urban safety, and public health. Methane, though a valuable fuel, becomes a powerful greenhouse gas and fire hazard when released uncontrolled from waste sites.
What is Methane?
- Methane (CH₄) is the simplest alkane, consisting of one carbon and four hydrogen atoms.
- It is odourless, colourless, tasteless, and lighter than air.
- On complete combustion, it produces CO₂ and water.
- It is the primary component of natural gas (80–95%), widely used for cooking, electricity, CNG vehicles, and industry.
Methane Emissions in India
- India is the third-largest methane emitter globally, after China and the USA.
- Annual emissions: 31 million tonnes (≈9% of global emissions).
- As per India’s 3rd Biennial Update Report (2016), methane emissions (excluding LULUCF) were 409 million tonnes CO₂e.
Major Sources of Methane
- Natural: Wetlands (anaerobic decomposition).
- Agriculture: Rice paddies, livestock enteric fermentation.
- Energy & Industry: Fossil fuel extraction and transport.
- Waste Sector:
- Landfills and wastewater treatment.
- Accounts for ~15% of India’s methane emissions.
- Others: Biomass burning, fertiliser production.
Why Landfills Are Critical Methane Hotspots
- Organic waste decomposes anaerobically in landfills.
- The same biological processes that formed fossil fuels are now occurring in urban dumpsites.
- Methane fuels landfill fires, explosions, and air pollution while accelerating global warming.
Global Warming Potential of Methane
- Over 20 years, methane is 84 times more potent than CO₂.
- Over 100 years, it is 28–34 times more potent.
- Thus, short-term methane reduction yields immediate climate benefits.
Limitations of Conventional Methane Estimation
- Traditional models rely on waste input volumes and baseline assumptions.
- Data are often aggregated, outdated, and infrequently updated.
- Ground-based monitoring is expensive, labour-intensive, and hard to scale.
- As a result, actual hotspots remain invisible.
Role of Satellite Monitoring
Satellite data bridge this gap through two approaches:
- Regional monitoring: Captures national and state-level trends.
- High-resolution detection: Pinpoints leaks down to a few square metres.
Key Satellite Platforms
- ISRO (2023 study)
- CarbonMapper – Tanager
- SRON missions
- ClimateTRACE & WasteMap platforms
Evidence from Indian Cities
- Ahmedabad: Pirana landfill identified as a major emitter.
- Mumbai: Deonar and Kanjurmarg landfills show emissions 10× higher than model estimates.
- Delhi: Ghazipur and Bhalswa landfills alone emit almost as much as the entire waste sector estimate.
- Hyderabad: Jawaharnagar landfill detected as a hotspot.
- Kolkata: Dhapa landfill shows significant emissions.
Globally, satellite surveys show landfill emissions can be 1.8 times higher than model-based estimates.
Data Gaps and Discrepancies
- State-level waste data is mostly from 2018.
- Satellite data shows emissions from single landfills rival entire sector estimates.
- This mismatch highlights a critical information and governance gap.
Integrating Satellite and Ground Action
- Satellite detection identifies hotspots.
- Ground teams verify causes:
- Poor waste covering
- Gas collection failure
- Illegal dumping
- This creates a feedback loop improving both detection and mitigation.
Policy and Institutional Coordination
Key requirements:
- Expand satellite coverage of all major landfills.
- Establish on-ground validation systems in metro cities.
- Create standardised data-sharing platforms.
- Urban Local Bodies currently operate separately from SPCBs.
- Revised municipal waste guidelines allow scope for a centralised methane data portal.
- CAQM and Swachh Bharat Mission can integrate methane targets into urban governance.
Climate, Urban, and Energy Co-benefits
- Methane capture enables energy recovery.
- Example: Indore’s Bio-CNG plant under GOBARdhan scheme.
- Benefits include:
- Reduced landfill fires
- Cleaner cities
- Renewable fuel generation
- Faster climate mitigation gains
Conclusion
Methane from landfills is both a serious climate threat and a missed opportunity. Satellite technology has finally made the invisible visible. By integrating space-based detection, ground-level action, and coordinated governance, India can transform landfill methane from an urban hazard into a strategic climate and energy solution—delivering cleaner cities, faster emission reductions, and tangible progress toward climate commitments.
UPSC PYQ
Q. Which of the following statements is/are correct about the deposits of ‘methane hydrate’? (2019)
- Global warming might trigger the release of methane gas from these deposits.
- Large deposits of ‘methane hydrate’ are found in Arctic Tundra and under the sea floor.
- Methane in the atmosphere oxidises to carbon dioxide after a decade or two.
Select the correct answer using the code given below.
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Ans: (d)
Q. Due to their extensive rice cultivation, some regions may be contributing to global warming. To what possible reason/reasons is this attributable? (2010)
- The anaerobic conditions associated with rice cultivation cause the emission of methane.
- When nitrogen-based fertilizers are used, nitrous oxide is emitted from the cultivated soil.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans: (c)
CARE MCQ
Q. Satellite-based methane monitoring is particularly significant for India because it:
(a) Replaces the need for waste segregation
(b) Identifies landfill methane hotspots with high spatial precision
(c) Eliminates the need for urban local bodies
(d) Fully substitutes ground-level environmental assessments
Answer: (b)
Explanation:
- Satellite monitoring enables precise detection of methane hotspots, overcoming data gaps in traditional models.
- It complements, not replaces, ground-level action and governance mechanisms.
Source: The Hindu
Relevance:
GS Paper 3: Conservation, Environmental Pollution & Degradation, Climate Change
Important Key Concepts for Prelims and Mains:
For Prelims:
- Methane (CH₄), Global Warming Potential (GWP), Landfill methane, Satellite monitoring, Global Methane Pledge, IMEO, CarbonMapper, ClimateTRACE
For Mains:
- Landfill methane emissions, Urban waste management and climate change, Role of satellite technology in environmental governance, Data-driven climate action
Why in News?
Satellite observations reveal that methane emissions from Indian landfills are far higher than official estimates, posing a serious challenge to India’s climate goals, urban safety, and public health. Methane, though a valuable fuel, becomes a powerful greenhouse gas and fire hazard when released uncontrolled from waste sites.
What is Methane?
- Methane (CH₄) is the simplest alkane, consisting of one carbon and four hydrogen atoms.
- It is odourless, colourless, tasteless, and lighter than air.
- On complete combustion, it produces CO₂ and water.
- It is the primary component of natural gas (80–95%), widely used for cooking, electricity, CNG vehicles, and industry.
Methane Emissions in India
- India is the third-largest methane emitter globally, after China and the USA.
- Annual emissions: 31 million tonnes (≈9% of global emissions).
- As per India’s 3rd Biennial Update Report (2016), methane emissions (excluding LULUCF) were 409 million tonnes CO₂e.
Major Sources of Methane
- Natural: Wetlands (anaerobic decomposition).
- Agriculture: Rice paddies, livestock enteric fermentation.
- Energy & Industry: Fossil fuel extraction and transport.
- Waste Sector:
- Landfills and wastewater treatment.
- Accounts for ~15% of India’s methane emissions.
- Others: Biomass burning, fertiliser production.
Why Landfills Are Critical Methane Hotspots
- Organic waste decomposes anaerobically in landfills.
- The same biological processes that formed fossil fuels are now occurring in urban dumpsites.
- Methane fuels landfill fires, explosions, and air pollution while accelerating global warming.
Global Warming Potential of Methane
- Over 20 years, methane is 84 times more potent than CO₂.
- Over 100 years, it is 28–34 times more potent.
- Thus, short-term methane reduction yields immediate climate benefits.
Limitations of Conventional Methane Estimation
- Traditional models rely on waste input volumes and baseline assumptions.
- Data are often aggregated, outdated, and infrequently updated.
- Ground-based monitoring is expensive, labour-intensive, and hard to scale.
- As a result, actual hotspots remain invisible.
Bureau of Energy Efficiency (BEE)
- Statutory body
- Established on 1 March 2002
- Under the Energy Conservation Act, 2001
Major Initiatives
- Standards & Labeling (S&L) Programme
- Demand Side Management (DSM) programmes
- Perform, Achieve and Trade (PAT) → replaced by Carbon Credit Trading Scheme (CCTS), 2023
- Nationwide awareness and capacity-building campaigns
Key Highlights of the President’s Address
Energy Conservation as the Cleanest Energy
- Energy conservation is the most environmentally friendly and reliable source of energy
- It is not optional, but a crucial necessity
Meaning of Energy Conservation
- Not merely “using less energy”
- Using energy wisely, responsibly, and efficiently
Practical Actions Highlighted
- Avoid unnecessary use of electrical appliances
- Adopt energy-efficient devices
- Utilise natural light and ventilation
- Embrace solar and renewable energy options
Environmental & Social Significance
- Reduces carbon emissions
- Helps maintain clean air and safe water
- Protects ecosystems
- Every unit of energy saved reflects:
- Responsibility towards nature
- Sensitivity towards future generations
Role of Youth and Behavioural Change
- Awareness among children and youth is critical
- Behavioural change is central to energy efficiency
- Participation of every citizen and sector is essential for India’s energy transition
Energy Conservation and Inclusive Development
- Access to affordable and clean energy:
- Empowers communities
- Stimulates local economies
- Creates new growth opportunities
- Green energy is not limited to electricity generation
- It is a tool for empowerment and inclusive development
Government Initiatives Highlighted
- Pradhan Mantri Surya Ghar Muft Bijli Yojana
- National Green Hydrogen Mission
- Renewable Consumption Obligation (RCO)
- Production Linked Incentive (PLI) schemes
Pradhan Mantri Surya Ghar Muft Bijli Yojana
This is a central government scheme, launched in February 2024, designed to provide free or highly subsidised electricity to one crore Indian households through the installation of rooftop solar panels.
- Objective: To enable households to become self-reliant in energy, reduce electricity bills (offering up to 300 units of free electricity monthly), and promote renewable energy use.
- Key Benefit: The government provides a direct subsidy to cover a significant portion of the installation cost:
- ₹30,000 for 1 kW systems.
- ₹60,000 for 2 kW systems.
- ₹78,000 for systems larger than 3 kW.
- Application: Eligible Indian citizens with a valid electricity connection can apply through the official PM Surya Ghar portal.
National Green Hydrogen Mission (NGHM)
Approved in January 2023 with an initial outlay of ₹19,744 crore, the NGHM aims to establish India as a global hub for the production, usage, and export of green hydrogen.
- Objective: Decarbonisation of major sectors like industry, mobility, and energy; reducing dependence on imported fossil fuels; and developing indigenous manufacturing capabilities.
- Target: To develop a green hydrogen production capacity of at least 5 Million Metric Tonnes (MMT) per annum by 2030, which is expected to attract over ₹8 lakh crore in investments and avert nearly 50 MMT of annual greenhouse gas emissions.
- Key Components: The Mission includes schemes for incentives (Strategic Interventions for Green Hydrogen Transition – SIGHT), pilot projects, R&D activities, and developing supply chain infrastructure.
Renewable Consumption Obligation (RCO)
The RCO is a regulatory mechanism that mandates specific electricity consumers to source a certain percentage of their total power consumption from renewable energy sources. Formerly known as the Renewable Purchase Obligation (RPO), it was recently revised and notified under the Energy Conservation (Amendment) Act, 2022.
- Obligated Entities: Distribution licensees (DISCOMs), open access consumers, and captive power plant users.
- Targets: The mandatory percentage is set to progressively increase from 29.91% in FY 2024-25 to 43.33% by FY 2029-30.
- Compliance: Entities can meet their obligation through direct consumption of renewable energy, purchasing Renewable Energy Certificates (RECs), or paying a “buyout” penalty price.
Production Linked Incentive (PLI) Schemes
The PLI scheme is a flagship initiative by the Government of India offering performance-based financial incentives to encourage domestic manufacturing, attract large investments, and boost exports across various strategic sectors.
- Mechanism: Incentives (usually a percentage of incremental sales/production) are provided to companies for a period of 4-6 years on products manufactured in India.
- Sectors Covered: The scheme has been rolled out across 14 key sectors, including large-scale electronics manufacturing (e.g., mobile phones), IT hardware, solar PV modules, pharmaceuticals, automobiles, textiles, telecom products, and white goods.
- Impact: The schemes have already realised significant investments and increased domestic production in sectors like mobile phone manufacturing. The Ministry of New & Renewable Energy (MNRE) also implements a specific PLI scheme for high-efficiency solar PV modules to build GW-scale capacity domestically.
Achievements (2023–24)
- Energy savings: 53.60 million tonnes of oil equivalent (Mtoe)
- Significant economic savings
- Substantial CO₂ emission reduction
LiFE Movement (Lifestyle for Environment)
- Rooted in India’s cultural tradition of living in harmony with nature
- Behavioural consciousness forms the basis of:
“Lifestyle for Environment – LiFE” - India’s message to the world on sustainable living
Significance for India
- Strengthens India’s energy security
- Reduces dependence on fossil fuels
- Accelerates low-carbon transition
- Supports SDGs, climate commitments, and green growth
Conclusion
The National Energy Conservation Awards 2025 reaffirm that energy efficiency is as much about human behaviour as it is about technology. Through strong institutional frameworks (BEE), visionary leadership, public participation, and initiatives aligned with LiFE, India is positioning itself as a global leader in energy conservation, climate responsibility, and sustainable development.
UPSC PYQ
Q. On which of the following can you find the Bureau of Energy Efficiency Star Label? (2016)
- Ceiling fans
- Electric geysers
- Tubular fluorescent lamps
Select the correct answer using the code given below:
(a) 1 and 2 only
(b) 3 only
(c) 2 and 3 only
(d) 1, 2 and 3
Ans: (d)
CARE MCQ
Q. The National Green Hydrogen Mission targets the production of how much green hydrogen annually by 2030?
(a) 2 Million Metric Tonnes
(b) 3 Million Metric Tonnes
(c) 5 Million Metric Tonnes
(d) 10 Million Metric Tonnes
Answer: (c)
Explanation:
- Approved in January 2023 with an outlay of ₹19,744 crore, the mission aims to make India a global green hydrogen hub.
- The target of 5 MMT per annum is expected to attract ₹8 lakh crore investment and reduce 50 MMT of GHG emissions annually.
