Hydrogen Train: What is special about the first hydrogen train, Ashwini Vaishnaw revealed the details, what do the experts say?

What makes the first hydrogen train special? Ashwini Vaishnaw explains the details; what do experts say? Hydrogen Train: पहली हाइड्रोजन ट्रेन में क्या खास, अश्विनी वैष्णव ने बताईं बारीकियां, एक्सपर्ट क्या बोले?