The World Bank has agreed to provide a subsidy of Rs seven lakh per bus, Adhikari said during the question hour.
While 100 buses would ply in Kolkata, the remaining 30 have been earmarked for industrial towns of Durgapur and Asansol.
Adhikari said the bus depots in these places were equipped for charging batteries and a single charge would allow a bus to run for 150 km.
By December this year, he said, 411 diesel buses manufactured by Volvo and others would also reach the state.