Secondly, wild animals lost their natural living environment owing to vegetation destruction, so some animals now become rarer and rarer besides of macro-animals being extinct, and so on.

• 指出正是由于不合理的人类活动，对汾河上游流域的环境产生了重大的影响，造成了植被的破坏、野生动物濒临绝迹、水土流失和土地退化的加剧。