In this video, a guy shows the simple process of extracting salt from sea water ... all the water." However, the narrator ...

Researchers at the University of Manchester have found a way to improve a graphene-based filter mechanism that could help convert sea water to potable water. Pure graphene can do the job ...

River water is considered fit for bathing if the BOD level is less than 3 milligrams per litre. This BOD level at Sangam was 5.09 milligrams per litre at 5 am on January 16.