-Down to Earth Inadequate sewage treatment and disposal in the national capital territory is contaminating city's groundwater Delhi residents who depend on groundwater for their drinking water needs be warned. The latest data of the Central Ground Water Board (CGWB) shows that groundwater samples taken from observation wells in the national capital are getting contaminated because of their unhygienic catchments and untreated sewage, which is discharged in the open and into drains,...

KEY TRENDS  • The new Cohort-based Migration Metric (CMM) shows that inter-state labor mobility averaged 5-6.5 million people between 2001 and 2011, yielding an inter-state migrant population of about 60 million and an inter-district migration as high as 80 million @* • The first-ever estimates of internal work-related migration using railways data for the period 2011-2016 indicate an annual average flow of close to 9 million migrant people between the states. Both these estimates are significantly greater than the...