阅读电视广告词：“If we don’t save water，the last drop of water will be a tear-drop.”根据提示，写一篇60-80词的短文。
Jinyun Mountain is a famous place of interest.Every day a lot of tourists come here to enjoy its beauty. But a few years ago，some of them paid no attention to protecting the environment.They threw their rubbish，such as plastic bags，fruit skins and waste paper on the ground.Sometimes they broke trees，picked flowers and killed birds. Some even made fires in the woods to cook food.How dangerous it was.Luckily，great changes have taken place here.Tourists are used to putting their rubbish into dustbins，and they are doing their best to protect the birds and plants as well.They bring their own meals instead of cooking to prevent starting a forest fire in the mountains.All these changes make us very happy.
Water is very important to humans.We can’t live without water.The water we can drink is falling.But some people don’t seem to care about it.They waste a lot of water.They pour dirty water into rivers and lakes.Water pollution is getting more and more serious.So we must do something to stop the pollution.We not only protect the water but also find ways to reuse it.If we don’t do this，the last drop of water will be a tear-drop.