Bio-toilets to be installed in all trains by the end of next year. Stating this Member (Rolling Stock), Ministry of Railways said in Bonn, Germany, yesterday that under the dynamic leadership of Railway Minister Piyus Goyal, the target of 100 per cent completion of installing bio-toilets in the Indian Raiways coaches has been advanced to December 2018. <br/><br/>Gupta was speaking at a event organised in Bonn to highlight Railway Ministry's efforts towards a low-carbon pathway and overall sustainable mobility initiatives in the Indian transport sector. On the occasion, other senior officials also called for a need for increasing role of renewables in the railways to achieve net decarbonisation.