联合国一项研究报告指出:全球现有12亿人面临着中度到重度缺水的压力,80个国家水源不足,20亿人的饮水得不到保证。预计到2025年,形势将会进一步恶化,缺水人口将达到28亿-33亿。我国属于缺水国之列,人均淡水资源仅为世界人均量的四 According to a UN research report, the existing 1.2 billion people in the world are under moderate to severe water shortages, 80 countries are under-sourced and 2 billion people are unable to secure their drinking water. It is estimated that by 2025, the situation will deteriorate further and the population of water-scarce will reach 2.8 billion -33 billion. My country belongs to the list of water-scarce countries, and fresh water resources per capita are only four of the world’s average per capita