The Great Wall is famous as the one of the miracles in the history, it attracts the people from all around the world to witness its greatess. But according to the research, the Great Wall is missing gradually, for it suffers the damage from both nature and human being. As the environment is polluted, the acid rain often comes and destroys the buildings in the long run. What’s more, the increasing number of tourists step on the bricks, which will damage the building. More unpolited behaviors have been reported, such as people like to write down some words to remember their trip here, which disfigures the appearance of this great site. When the Great Wall disappears some day, it is the greatest pity, we are no longer have the chance to appreciate its grandness. To save this miracle, we need to behavior ourselves and protect the environment. 
长城是历史上一个著名奇迹,它吸引了来自世界各地的人去见证。但根据研究,长城正在逐渐消失,因为受到来自自然和人类造成的损害。随着环境受到污染,经常下酸雨，长期破坏建筑物。而且,越来越多的游客踏在砖上,这会损害建筑。越来越多不礼貌的行为被报道出来,比如人们喜欢写一些词来纪念他们的旅行,这会让长城的外观变形。长城有一天消失了,这是最大的遗憾,我们不再有机会去欣赏它的雄壮。为了拯救这个奇迹,我们需要我们约束,保护环境。