evidence: NEW DELHI: The Indian Railways has finally installed the bio-toilets in the entire fleet of passenger coaches as part of the Swachh Bharat Mission with the support of Defence Research and Development Organisation (DRDO). Adopting the ‘anaerobic bacteria’ the first of its kind in railway systems in the world the Indian Railway (IR) has installed the bio-toilets in 79,269 passnger coaches during 2021-22 ,which prevent fall of nearly 2, 74,000 litres human excreta on tracks every day. [...] "This technology under ‘Make In India’ initiative has brought a paradigm shift in cleanliness at staion premises and tracks, which can been seen across the railways," Jain claimed, adding that the Gwalior-Varanasi Bundhelkahnd was the first train that was fitted with IR-DRDO bio-toilet in 2011. Acting over received outputs, the fitments was ramped to a great extent that has now made the entire fleet of passenger trains equipped with the bio-toilets.