The future adequacy of freshwater resources is difficult to assess, owing to a complex and rapidly changing geography of water supply and use. Numerical experiments combining climate model outputs, water budgets, and socioeconomic information along digitized river networks demonstrate that (i) a large proportion of the world's population is currently experiencing water stress and (ii) rising water demands greatly outweigh greenhouse warming in defining the state of global water systems to 2025.

In some areas of Bangladesh and West Bengal, concentrations of As in groundwater exceed guide concentrations, set internationally and nationally at 10 to 50 ?g l?1 and may reach levels in the mg l?1 range. The As derives from reductive dissolution of Fe oxyhydroxide and release of its sorbed As.

A movement to recharge the depleted groundwater aquifers in a parched district of Madhya Pradesh gathers momentum

A civil engineer revives an age old system of farmers managing irrigation tanks in Tamil Nadu