Tianshan, China

China yesterday closed melting glaciers in its north-west Tianshan mountain range to tourists who littered, polluted and even drove across ice. The mountains supply 2.3 million people in Urumqi with water and are 1) ________ to hydro-electric schemes but are shrinking by eight metres a year as a result of global warming and increased tourism. China is battling to clean up its heavily polluted waterways and stave off water shortages across the 2) __________ northern regions that have been 3) __________ by waste and mismanagement.