Discuss the significance of hydrogen fuel cell technology in decarbonising India's transport sector, with reference to the Indian Railways' hydrogen trainset initiative.

Transport contributes a large share of India's energy-related emissions. Hydrogen fuel cells—generating onboard electricity from hydrogen with only water vapour as by-product—offer a zero-emission pathway, exemplified by India's first indigenous Hydrogen Fuel Cell Trainset flagged off on the Jind–Sonipat section in July 2026 [1].

Significance for decarbonisation

• Environmental: near-zero point-of-use CO₂; operationalises the National Green Hydrogen Mission and the Net Zero 2070 goal, extending gains from railway electrification [1].
• Energy security: cuts imported-diesel dependence, easing forex outgo.
• Reach beyond electrification: viable for un-electrified heritage/hill routes—the "Hydrogen for Heritage" plan envisages 35 trains (~₹80 cr/train) [2].

The trainset as proof of concept

• Indigenous scale: 10-coach configuration (~2,600 passengers) exceeds the global 2–4 coach norm, showcasing Atmanirbhar rail-tech via ICF, RDSO and Medha [1].
• Ecosystem: India's largest railway hydrogen hub at Jind (~3,000 kg storage), cleared by PESO with TÜV SÜD certification—a replicable safety-plus-refuelling template [3].

Challenges

• High capital cost (₹70 cr/route ground infrastructure) [2].
• Green hydrogen supply depends on electrolysis scaling at Jind [4].
• Storage/handling safety and round-trip energy losses versus direct electrification.

Hydrogen fuel cells thus complement—not replace—electrification, greening the "last mile" of hard-to-electrify routes. Scaled prudently alongside falling green-hydrogen costs, the Jind–Sonipat pilot can anchor India's clean-mobility transition and its climate commitments.