claim: Bio-toilets are introduced in train coaches only after 2014
evidence: One Lakh Twenty Five Thousands Bio-Toilets Installed in Trains Coaches [...] Beginning with the introduction of 57 bio-toilets in one train i.e. Gwalior-Varanasi Bundelkhand Express in January 2011, Indian Railways has provided about 1,25,000 bio-toilets in its coaches till March 2018. This covers about 60% of coaching fleet of Indian Railways. During 2017-18, IR has installed highest ever bio-toilets in coaches which is 40% higher than the set target of 40,000 bio-toilets and 64% higher than the fitment of 34134 bio-toilets in 2016-17. [...] "Bio-Toilet project" of Indian Railways is an innovative & indigenous development of technology. This technology is first of its kind being used by any railroad in the world for On-board accelerated digestion of human waste. These bio-toilets are fitted underneath the lavatories and the human waste discharged into them is acted upon by a colony of anaerobic bacteria that convert human waste mainly into water and small amount of bio-gases. The gases escape into atmosphere and waste water is discharged after chlorination onto the track. Human waste, thus, does not fall on the railway tracks thus improving cleanliness and hygiene at platforms, and facilitate track and coaches maintenance staff to perform their work more efficiently. The Bio-toilet project is very much aligned with ‘Swachh Bharat Mission’, launched by Hon’ble Prime Minister of India.