1·Once, people used too much underground water.
过去，人们使用了太多的地下水。
2·People used too much underground water. The temperature has become higher over the years.
人们使用了太多的地下水，这些年来温度变得更高了。
3·This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone.
这种气体是硫化氢，上升后与石灰岩裂缝中地下水的氧气混合。
4·More than 20,000 apartments in France are now heated by warm underground water drawn from a heat reservoir in a geologic structure near Paris called the Paris Basin.
目前在法国，有超过2万套的公寓是由温暖的地下水供暖的，这些地下水来自一个叫做巴黎盆地的地质构造的热储，位于巴黎附近。
5·Excessive use of fertilizers and pesticides also pollute underground water.
此外，过度使用化肥和杀虫剂也使地下水遭到污染。