More children in South Asia are struggling due to severe water shortages exacerbated by the effects of climate change than anywhere else in the world, the United Nations said on Monday. “A staggering 347 million children under the age of 18 are exposed to high or extremely high water scarcity in South Asia, the highest number of any region in the world,” the UN children’s agency said in a report. The eight-nation region, which includes Afghanistan, Bangladesh, Bhutan, India, Nepal, the Maldives, Pakistan and Sri Lanka, is home to more than a quarter of the world’s children. “Climate change is