The Asian Development Bank forecasts that by 2030, India will encounter a water deficit of 50%. UN projects 840 mn people to live in the most water starved parts of the country by 2050, as compared to about 320 mn people in 2017. India's Union Ministry of Water Resources has reckoned the country's current water requirement to be around 1100 billion cubic metres(m3) per year, which is estimated to rise to around 1200 billion m3 for the year 2025 and further to 1447 billion m3 by 2050. With a projected population growth of 1.4...