世界水资源的缺乏World Water Shortage A new study warns that about thirty percent of the world's people may not have enough water by the year 2025. 一项新的研究结果提出警告：到2025年，世界上将有30%的人没有足够的水饮用。 A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million
