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
环境保护工作者
A conservationist is someone who cares greatly about the conservation of the environment and who works to protect it.