As the expression goes "Lucid waters and lush mountains are invaluable assets." This statement reveals the relationship between environmental protection and economic development. With the development of modern cities, we have severely polluted the environment in the past decades, leaving so many animals endangered as a result of losing their natural habitat. At the same time, we human beings are also seriously affected as fresh water and clean air has become more and more scarce. Therefore, we must take action to practice the concept in the statement. As individuals, we may reduce waste and pollution in our daily life, try to recycle when possible, and take public transport whether on trip or not. In addition, travelers who break the local rules around the scenic spot should be punished. Hopefully, with each one of us' effort, we can secure a sustainable future.