论文部分内容阅读
严重干旱迫使研究人员们不得不重新考虑如何利用科技来为人类提供更多的淡水。在饱受干旱折磨的加利福尼亚州,圣地亚哥的情况是最为糟糕的。它的降水量甚至少于炎热的洛杉矶或弗雷斯诺,地下水储量低于加利福尼亚州的其他地区,超过80%的生活及商业用水依赖外部输入,而水的来源日益紧张。人们对科罗拉多河的过度取水
Severe droughts have forced researchers to reconsider how technology can be used to provide more freshwater to humans. In the drought-afflicted state of California, the situation in San Diego is the worst. Its precipitation is even less than that of hot Los Angeles or Fresno, with groundwater reserves lower than in other parts of California, and over 80% of domestic and commercial water use relies on external inputs and the source of water is increasingly tense. People take excessive water from the Colorado River