What lies beyond India’s E20 push
2-minute summary
India's push for E20 fuel—a blend of 20% anhydrous ethanol and 80% motor gasoline—aims to reduce crude oil imports, lower carbon emissions, and provide economic savings. However, recent analysis reveals significant trade-offs. A joint study by ARAI, SIAM, and IOCL confirmed that E20 reduces fuel economy by 2% to 6% due to ethanol's lower energy density compared to pure gasoline. This mileage drop has cost Indian consumers an estimated ₹88,234 crore extra over the last three years, as more fuel is required to cover the same distance. Furthermore, if mileage loss exceeds 4%, the net carbon emissions actually increase rather than decrease. Additionally, diverting food crops like sugarcane and maize for ethanol production poses severe risks to food security, agricultural exports, and water resources, challenging the net benefits of the Ethanol Blended Petrol (EBP) programme.
Why it's in the news
A study and parliamentary disclosures have highlighted that the economic and environmental benefits of India's E20 ethanol blending program are being offset by a 2% to 6% reduction in vehicle mileage, costing consumers ₹88,234 crore over three years and raising critical concerns about food security and net carbon emissions.
Background and context
India launched the Ethanol Blended Petrol (EBP) Programme in 2003 to promote the use of alternative and environment-friendly fuels. Initially targeting 5% blending, the government progressively raised ambitions. The National Policy on Biofuels, 2018, originally set a target of 20% ethanol blending (E20) by 2030. In 2022, this target was officially advanced to the biofuel year 2025-26. Ethanol is an agro-based product, mainly produced from sugarcane juice, molasses, and damaged food grains like maize and broken rice. While ethanol has a higher octane rating than gasoline, it possesses lower energy density (about one-third less energy per unit volume), which directly impacts the fuel efficiency of internal combustion engines, particularly older, non-E20-compliant vehicles.
Constitutional provisions
- Article 48A — Directs the State to protect and improve the environment and safeguard forests and wildlife, serving as the constitutional basis for promoting cleaner biofuels.
- Article 39(b) — Directs policy towards securing that the ownership and control of the material resources of the community are so distributed as best to subserve the common good, relating to energy security and resource allocation.
Committees and reports
- Roadmap for Ethanol Blending in India 2020-25 (NITI Aayog) — Laid down the detailed pathway, feedstock requirements, and vehicle compatibility guidelines to achieve the accelerated 20% blending target by 2025-26.
- ARAI-SIAM-IOCL Joint Study — Quantified the reduction in fuel economy caused by E20 fuel, establishing a mileage loss of 2% to 6% depending on vehicle category and vintage.
Government schemes
- Ethanol Blended Petrol (EBP) Programme — The core administrative framework governing the procurement, pricing, and blending targets of ethanol with motor spirit (petrol) in India.
- National Policy on Biofuels — Provides the overarching policy framework for categorizing biofuels (1G, 2G, 3G) and expanding feedstock scope to ensure sustainable fuel transition.
International organisations
- Global Biofuels Alliance (GBA) — An India-led initiative launched during the G20 New Delhi Summit in 2023 to accelerate the global uptake of biofuels by facilitating technology transfer and setting robust standards.
Previous UPSC questions on this theme
- Prelims GS-1 2020 — According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ? 1. Cassava 2. Damaged wheat grains 3. Groundnut seeds 4. Horse gram 5. Rotten potatoes 6. Sugar beet Select the correct answer using the code given below : (a) 1, 2, 5 and 6 only (b) 1, 3, 4 and 6 only (c) 2, 3, 4 and 5 only (d) 1, 2, 3, 4, 5 and 6
Mains practice: Critically analyze the socio-economic and environmental trade-offs of India's accelerated E20 ethanol blending program. How can India balance its energy security goals with food security concerns?
India's transition to E20 fuel (20% ethanol blend) by 2025-26 is a cornerstone of its green energy transition, aimed at reducing crude oil imports and mitigating greenhouse gas emissions. However, this transition presents complex trade-offs across economic, environmental, and agricultural dimensions.
**Socio-Economic and Environmental Trade-offs:**
• **Consumer Financial Burden:** Ethanol has lower energy density than gasoline. According to a joint ARAI-SIAM-IOCL study, E20 reduces fuel economy by 2% to 6%. This mileage loss has cost Indian households an estimated ₹88,234 crore extra over three years, effectively shifting the financial burden of the energy transition onto consumers.
• **Net Emission Dilemma:** While ethanol contains less embodied carbon per litre, the loss in mileage requires vehicles to consume more fuel per kilometer. If mileage loss exceeds 4%, net carbon emissions actually increase, neutralizing the environmental benefits for older, non-compatible vehicles.
• **Food vs. Fuel Conflict:** Diverting food crops like sugarcane, maize, and broken rice to ethanol production threatens food security, drives food inflation, and reduces agricultural export surpluses.
• **Ecological Strain:** Sugarcane is a highly water-intensive crop. Expanding its cultivation for biofuel production severely depletes groundwater resources in water-stressed regions.
**Way Forward to Balance Energy and Food Security:**
• **Transition to 2G Biofuels:** Shift feedstock focus from first-generation (1G) food crops to second-generation (2G) lignocellulosic biomass, such as agricultural residues (paddy straw, cotton stalks), to prevent food-crop diversion.
• **Differential Pricing and Taxation:** Introduce lower GST or retail price incentives for E20 fuel to compensate consumers for the loss in mileage.
• **Mandating Engine Compatibility:** Ensure strict compliance of all new vehicles with E20-tuned engines to minimize fuel economy losses.
• **Comprehensive Life-Cycle Assessment (LCA):** Conduct rigorous LCA studies to monitor net carbon emissions and water footprints, ensuring that biofuel policies align with genuine ecological sustainability.
In conclusion, while the E20 push is vital for strategic autonomy, its success depends on transitioning to non-food feedstocks and protecting consumers from hidden economic costs.
Prelims practice questions
Q1. With reference to the physical and chemical properties of ethanol-blended petrol (E20), consider the following statements: 1. Ethanol has a higher energy density per litre compared to pure motor gasoline. 2. The use of E20 fuel can lead to a reduction in vehicle fuel economy by up to 6% depending on the vehicle's vintage. 3. If the mileage loss of a vehicle running on E20 exceeds 4%, its net carbon emissions per kilometer may increase compared to lower blends. Which of the statements given above are correct?
- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
Answer: B. Statement 1 is incorrect: Ethanol has a lower energy density (releases less energy per litre burnt) than pure gasoline. Statements 2 and 3 are correct: A joint study by ARAI-SIAM-IOCL confirmed a 2% to 6% reduction in fuel economy, and calculations show that if mileage loss is in the 4% to 6% range, net emissions rise due to higher volumetric fuel consumption per kilometer.
Q2. The 'Global Biofuels Alliance' (GBA), recently seen in the news, was officially launched under the presidency of which country?
- France
- United States of America
- India
- Brazil
Answer: C. The Global Biofuels Alliance (GBA) was officially launched by India during the G20 Summit in New Delhi in September 2023, with India, the US, and Brazil as its founding members.
Q3. Under the Ethanol Blended Petrol (EBP) Programme in India, which of the following feedstocks are permitted for ethanol production? 1. Sugarcane juice and B-heavy molasses 2. Damaged food grains unfit for human consumption 3. Maize 4. Surplus rice from Food Corporation of India (FCI) stocks Select the correct answer using the code given below:
- 1 and 2 only
- 2, 3 and 4 only
- 1, 3 and 4 only
- 1, 2, 3 and 4
Answer: D. Under the National Policy on Biofuels and subsequent amendments, all the listed feedstocks—sugarcane juice, B-heavy molasses, damaged food grains, maize, and surplus FCI rice—are permitted for ethanol production to meet blending targets.
Revision flashcards
- What is E20 fuel, and when was it first introduced in India? E20 is a fuel blend consisting of 20% anhydrous ethanol and 80% motor gasoline. It was first introduced in India on February 6, 2023, at select outlets.
- What is the revised target year for achieving 20% ethanol blending in petrol in India? The target year was advanced from 2030 to the biofuel year 2025-26.
- Why does E20 fuel cause a drop in vehicle mileage? Because ethanol has a lower energy density than pure gasoline, meaning it releases less energy per unit volume when combusted.
- What is the difference between 1G and 2G ethanol feedstocks? 1G (First Generation) uses food crops like sugarcane juice, molasses, maize, and starch. 2G (Second Generation) uses non-food biomass and agricultural residues like paddy straw, bagasse, and bamboo.
- According to the ARAI-SIAM-IOCL study, what is the range of fuel economy reduction caused by E20? It reduces fuel economy by 2% to 6%, depending on the vehicle category and vintage.