"Other such corridors being envisaged are the "triveni" of Allahabad, Kanpur and lucknow and Mumbai-Pune in the west. A Hyderabad, Andhra Pradesh southern corridor is very much a possibility. Andhra Pradesh is showing great interest, while Bangalore has already started laying CNG pipelines," he added.Describing "clean energy as gas-based energy", Pradhan said bio-fuels would contribute to the composition of the green energy corridors.