Although the planned operation will be located more than miles away, drawing the soda ash in through pipelines, conservationists worry it could still upset the natural water cycle and breeding grounds.
2017年12月六级真题（第三套）阅读 Section C
柯林斯高阶英汉双解学习词典释义
N-COUNT
（常指埋于地下的石油或燃气）管道，管线
A pipeline is a large pipe which is used for carrying oil or gas over a long distance, often underground.