Mr. Si told me, the reasons of the ecological environment deterioration in Qinghai Lake are rat damage to vegetation and overgrazing, in addition to we have previously known, etc.

• 我听司叔叔说，导致青海湖生态环境恶化的原因，除了我们先前知道的，还有老鼠打洞破坏植被，还有过度放牧等