Chapter 5: How Do We Move India Without Burning Oil?

The Big Idea

India imports roughly 85–90% of its crude oil, and most of it is burnt in vehicles. A petrol or diesel engine turns only about 20–30% of its fuel energy into motion; an electric drivetrain delivers 75–90%. Electrifying transport therefore cuts both the import bill and the energy wasted — but only helps the climate as fast as the grid itself gets cleaner.

Did You Know?

Indian Railways has electrified about 99% of its broad-gauge network and aims to become a net-zero carbon emitter by 2030, buying large amounts of solar and wind power for traction. Electric vehicle sales in India have crossed 10% of all vehicles sold, led overwhelmingly by two- and three-wheelers.

Story Time — Ayesha Swaps the Battery

Ayesha, age 15 · Patna, Bihar

Ayesha’s mother drives an e-rickshaw in Patna. For two years the family’s biggest worry was charging: eight hours on a home socket meant hours not earning, and a tired battery meant shorter trips.

Then a battery swapping station opened nearby. Instead of charging her pack, Ayesha’s mother now slides out the empty one and slides in a charged one in under three minutes, paying only for the energy.

Ayesha did the arithmetic for her economics project. Their old CNG auto cost about ₹3 per kilometre in fuel. The e-rickshaw costs under ₹1. “The vehicle is cheaper to run, but the battery is the expensive part — so renting it instead of owning it changes everything for a family like ours.”

She also found the catch. Swapping needs standard battery sizes and connectors, and stations must be close enough to be useful. “Technology is only half of it,” she wrote. “The other half is standards and networks.”

India has millions of electric three-wheelers, most of them quietly earning a living like her mother’s. “The revolution everyone predicts for cars,” Ayesha told her class, “already happened on our streets.”

Story Time — Debjani at the Loco Shed

Debjani, age 16 · Kharagpur, West Bengal

Debjani grew up beside the railway line at Kharagpur, counting locomotives. Her aunt, an electrical engineer at the loco shed, finally took her inside.

Standing under a WAG-9 freight locomotive, her aunt explained the scale: “This one draws power from the 25 kV overhead line. No diesel, no exhaust. Across the country, nearly all of our broad-gauge routes are now electrified.”

Then she showed Debjani something surprising: the brakes. “When the train slows, the motors act as generators and send power back into the overhead line. That is regenerative braking. On a hilly section, a descending train can help power a climbing one.”

Debjani asked the obvious question. “If the electricity still comes from coal, what have we gained?” Her aunt nodded approvingly. “Three things. Rail moves a tonne far more efficiently than a truck. Electric traction wastes less than diesel. And a single source can be cleaned up — the Railways is buying solar and wind and aiming for net zero by 2030. You cannot clean a million diesel engines one by one.”

Debjani left with a new ambition: to design traction systems. “The greenest journey,” she wrote in her diary, “is the one already running on rails.”

🔢 Numbers Corner

Running cost per km = (kWh per km) × (₹ per unit) versus (litres per km) × (₹ per litre). At 0.15 kWh/km and ₹8 per unit, an EV costs ₹1.20/km; a car at 15 km/l with petrol at ₹105 costs ₹7.00/km.

Myth or Fact?

Myth: Electric vehicles are pointless in India because our electricity comes from coal.

Fact: Even on a coal-heavy grid, EVs usually emit less per kilometre because electric drivetrains are far more efficient and power plants are cleaner per unit of fuel than millions of small engines. The advantage grows every year as the grid gets cleaner.

🔬 Try it in the Green Energy Lab

Experiment with these ideas in Lab 3: EV vs Petrol Calculator.

Brain Buster

Ask a local e-rickshaw or EV owner what they pay per kilometre, and compare it with a petrol vehicle owner. Whose answer surprised you more?