The Delhi Metro Railway Corporation (DMRC) was declared as the world’s first green metro after it added a green certification for all its major buildings and installations. Apart from depots and sub stations, DMRC was also awarded the platinum rating for its 10 residential colonies for adherence to green building norms by the IGBC. The declaration was made during National Conference on Green Metro Systems by the Indian Green Building Council (IGBC). The conference was attended by delegates from all other Metro systems in the country.