Looking back at the end do the 20th century,people have already achieved substantial awareness of the environmental problems of the global village:environmental degradation,rapid climate change,destruction of the ozone layer etc.

• 回望20世纪末，人们对自然环境的破坏、气候的急剧变化、臭氧层的破坏等环境问题已经上升到了地球村的总体问题的认识上了。