THIRUVANANTHAPURAM: In a bid to promote green fuels, Union Minister of State for Petroleum, Rameshwar Teli, announced that the ministry would start hydrogen-filling stations in the state. The minister also congratulated the state government for its various initiatives to promote eco-friendly fuels. He was speaking at the Evolve-2023, a conference and expo on e-mobility and alternative fuels, in Thiruvananthapuram on Friday.