Representational picture (File/IANS)Hisar: In what could be a game-changer for farmers in terms of fertiliser broadcasting and pesticide spraying, a Haryana-based start-up has claimed to have developed India's first indigenous Hydrogen-powered drone capable of operating three hours at a stretch with 10 to 50 kilograms of payload. The unmanned aerial vehicle (UAV) once launched on a commercial scale,...