精选优质文档-倾情为你奉上9.保护野生动植物Wildlife ProtectionDinosaurs died out because of an unexpected incident. But wildlife today disappears or is in danger just because humans do harm to it. For example, tigers are hunted for fur to make carpets so that they can only live in secure reserves; grassland is destroyed without mercy so that dust storms come into being affecting distant cities.Last year, scientists saw some monkeys rubbing themselves with a certain kind of insects to protect themselves
