研究人员在1月25日的《自然》杂志上报告说，世界上珍贵的地下淡水储备正在萎缩，在近三分之一的含水层中，这种损失在过去的几十年里一直在加速。
不可持续的地下水抽取和气候变化的双重打击导致全球平均水位下降，导致水资源短缺、地表塌陷和海水侵入含水层。这项新的研究表明，自2000年以来，许多地方的地下水下降速度加快，但也表明，通过更好的水管理，这些损失是可以逆转的。
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您好:手机麻将这款游戏可以开挂的,确实是有挂的,通过添加客服微信安装这个软件.打开.
手机麻将怎么辅助是可以的，看以下步骤：
一、首先在官方下载游戏app或者添加小程序（其他链接）
二、打开你手机游戏玩法，找到在应用中找到对应的玩法辅助器。
二、打开辅助器按照辅助器的教程操作
三、按照操作使用教程:
7不懂找到前方图片中的微信号咨询
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It’s the first effort to synthesize global-scale groundwater data collected on site, rather than assessed by satellite. Previous studies have quantified the scope of global groundwater loss by analyzing data collected by a pair of NASA satellites known as GRACE (SN: 6/18/15). But while satellites can scan the entire globe, some of the nuance of water loss — and recovery — in regio
To assess how groundwater is changing in aquifers, hydrologist Scott Jasechko of the University of California, Santa Barbara and colleagues analyzed water level data collected since 1980 in a
Using the well data, the team identified wher
But there are signs of hope, the researchers say. In some areas, groundwater levels have begun to climb in the last two decades, even after shrinking at the end of the 20th century. Those recoveries are probably due to changes in regio
These reversals suggest that “long-term groundwater losses are neither universal nor inevitable,” the team says.
The results are also im
By identifying hot spots that need the most urgent attention, this work also helps highlight which parts of the world are most at risk of involuntary human migration due to water shortages, says Xu, of the University of Saskatchewan’s Global Institute for Water Security in Saskatoon, Canada. “Water is the key trigger for human migration or displacement worldwide, and those populations in low- and middle-income countries and in dry regions are most vulnerable.” Identifying those regions most at risk could lead to timely policy interventions, he says, “especially cross-border [aquifers] that could further increase the risk of armed conflicts.”
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