Q15 · UPSC Civil Services Mains 2023 · GS III · 15 marks · 2 min read

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The adoption of electric vehicles is rapidly growing worldwide. How do electric vehicles contribute to reducing carbon emissions and what are the key benefits they offer compared to traditional combustion engine vehicles?

Topic: Environment and Conservation. Syllabus: Conservation, environmental pollution and degradation, environmental impact assessment. Same official PYQ from year-wise 2023 and Environment and Conservation.

Revision summary

EVs have no tailpipe carbon; life-cycle carbon depends on a still coal-heavy but greening Indian grid. They are usually cleaner than petrol cars because power plants beat small engines, especially as renewables grow. Two- and three-wheelers matter most for India’s kilometres and oil bill. Versus ICE, EVs win on efficiency, running cost, noise, and local air; they lag on price, range, and charging. FAME II and Advanced Chemistry Cell PLI are the Union levers; recycling and clean charging complete the carbon claim.

Model answer

Copper italics in this answer — like this — are the key facts. Each one is unpacked in the Facts & figures rail.

Introduction

An electric vehicle (EV) replaces tank petrol or diesel with a battery and a motor. Tailpipe carbon at the street falls to zero. National carbon falls only if the grid that charges the battery is cleaner, and if the battery is made and recycled without a new mess. India is pushing that shift with Faster Adoption and Manufacturing of Electric Vehicles (FAME II) and industrial incentives.

Body

Reducing the carbon footprint

  • No tailpipe CO2 or NOx in the city; that is immediate air-quality gain even before the grid is green.
  • Over the vehicle’s life, carbon depends on kWh of electricity and how those kWh are made. India’s grid is still coal-heavy, so a charged EV is not a zero-carbon machine today. It is usually lower carbon than a petrol car because a power plant is more efficient than a small engine, and because renewables on the grid keep rising.
  • Two- and three-wheelers dominate Indian kilometres. Electrifying them cuts a large share of urban fuel use with smaller batteries than cars.
  • Less oil import is a carbon and a current-account gain: transport is a large slice of diesel and petrol demand.
  • Gains shrink if users charge on diesel generators, if batteries are dumped, or if extra coal plants are built only for peak charging. Pair EVs with renewable power, time-of-day tariffs, and recycling.

Benefits versus internal combustion engine (ICE)

  • Energy efficiency: more of the energy in the battery becomes motion; an ICE wastes most of the fuel as heat.
  • Running cost: electricity per kilometre is typically lower than petrol or diesel at Indian retail prices.
  • Local air and noise: no exhaust; quieter streets.
  • Maintenance: no oil change, simpler drivetrain; brake wear falls with regenerative braking.
  • Torque and drivability in city start-stop traffic.
  • Offsets: higher purchase price (falling with scale), range and charge time, charging access, and battery minerals. ICE still wins on long-haul heavy trucks until chemistry and trucks catch up.

Policy

  • FAME II subsidises eligible e-buses, two- and three-wheelers and some cars, and supports charging points.
  • Production Linked Incentive for Advanced Chemistry Cell batteries and for auto champions aims to make cells in India.
  • State EV policies add road-tax waivers. The carbon story succeeds if these raise utilisation of clean kWh, not only showroom numbers.

Flow diagram

Flow diagram

Conclusion

EVs cut street carbon and usually cut life-cycle carbon versus ICE as the grid adds renewables. They win on efficiency, running cost, and city air. FAME II and battery PLI are the adoption tools. They fail the climate test if charging stays coal-only and batteries stay unrecycled.

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