One possible version:
World Heritage sites enjoy a long history with rich content. They are priceless cultural treasures for human beings.
However, World Heritage sites are now facing many serious problems. Firstly, some sites are badly damaged or completely destroyed by natural disasters such as earthquakes, sandstorms, weathering and so on. Secondly, many directors choose the beautiful World Heritage sites to shoot films and TV plays. Some visitors scratch on the old buildings, stones and trees, and many sites are seriously polluted. Besides, constant wars and a lot of construction also do great damage to some sites.
Obviously, many factors contribute to the damage of World Heritage sites and it's an urgent task for us to take steps to preserve them… One possible version:
World Heritage sites enjoy a long history with rich content. They are priceless cultural treasures for human beings.
However, World Heritage sites are now facing many serious problems. Firstly, some sites are badly damaged or completely destroyed by natural disasters such as earthquakes, sandstorms, weathering and so on. Secondly, many directors choose the beautiful World Heritage sites to shoot films and TV plays. Some visitors scratch on the old buildings, stones and trees, and many sites are seriously polluted. Besides, constant wars and a lot of construction also do great damage to some sites.
Obviously, many factors contribute to the damage of World Heritage sites and it's an urgent task for us to take steps to preserve them…