Our aquifers are draining faster than they can be replenished , and the biggest , ogallala , which stretches from South Dakota to texas , has seen localized drops in the water table of150 feet .
我们的地下水使用比注入得更快并且更多，从南达科他州延伸到德克萨斯州的奥加拉拉的水量下降到150英尺。
ogallala