It is generally believed that there is a good supply of fresh water. But to our disappointment, the fact is just the opposite. 　　As we can see, the world population is growing rapidly day by day. So enough fresh water is needed to feed such a big population. What’s more, with the development of industry, factories and vehicles produce poisonous gases or wastes, which consequently res...[继续阅读]

    Spring is tht best season of the year. The weather gets warmer and warmer. My clas i‘amates and I took a one-day sightseeing around our city.The scene was pretty. But when we saw the rivers along our city, I felt very sorry, and thoughit a lot. 　　 With the development of modern agriculture and industry, more and more waste water is being poured into rivers. It has caused serious poll...[继续阅读]