Large dams have harmed Siberia's delicate ecological balance.

大型水坝对西伯利亚脆弱的生态平衡造成了破坏。

...ecological disasters, such as the destruction of rainforest.

雨林破坏等生态灾难

Ecological groups say that nothing is being done to tackle the problem.

环境保护组织称目前并未采取任何行动处理这个问题。