ecological disasters such as the destruction of rainforests像热带雨林遭到破坏这样的生态灾难

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 groups say that nothing is being done to tackle the problem.生态保护组织称目前并未采取任何行动应对这个问题。