(2) Union Railway MinisterSuresh Prabhu, on 24 July2016, inaugurated the firstgreen train corridor betweenRameswaram and Manamadurai,in Tamil Nadu. This corridorenvisages usage of biotoiletsfor zero human wastedischarge. Developed by theIndian Railways and DefenceResearch and DevelopmentOrganisation (DRDO), bio-toiletscollect human waste intanks and decomposes thewaste using bacteria, thusensuring zero discharge ontracks.