Thirsty megacities poisoning rural groundwater: study

A massive drawdown of water beneath delta-based megacities across the world may be pulling surface pollution deeper into the ground, risking contamination and health problems for local populations, a new study said Tuesday. Research led by Holly Michael of the University of Delaware in the United States used the example of Bangladesh's capital Dhaka to show how unsustainable water use was exacerbating arsenic pollution. Water consumption in greater Dhaka, home to some 18 million people, is lower