JODHPUR, Oct. 26 -- The National Green Tribunal (NGT) on Thursday issued stringent directives to halt the rampant illegal sand mining activities in Jaisamand Lake, the second-largest artificial lake in India, in Udaipur. Despite previous orders to stop mining operations in the lake's catchment area, a recent report submitted by a joint committee revealed that illegal activities continue unabated, posing a serious threat to the environment....