在浩瀚的宇宙中，一颗名为“星河”的星球，静静地诉说着古老而神秘的传说。在这片广袤的土地上，流传着一个关于“星河之心”的传说，它承载着无数生灵的信仰与希望。如今，一位勇敢的少年踏上了寻找星河之心的征途，一场跨越时空的冒险就此展开……

1. We should stop factories from producing harmful gases.我们应该阻止工厂生产有害气体。

2. we can't live without water.没有水我们就不能生存。

3. They waste a lot of water in their daily life.日常生活中他们浪费很多水。

4. But some people don't care about it.但是有些人却不关心或不在意。

5. Many rivers and lakes are seriously polluted.很多河流湖泊已经受到严重污染。

6. As we know , water is very important to man.我们知道，水对人类来说是非常的重要。

7. Something must be done to stop the pollution.人类必须采取一些措施来制止污染。

8. No one can live without water or air.没有人能离开水和空气生存。

9. Let's do our best to make it more beautiful.让我们尽力让它更美丽。

10. Planting trees Trees are very helpful and important for us.树对我们人类是多么的重要和有用。

11. Do not throw rubbish onto the ground. Do not waste water. Use both sides of paper when you write. Stop using plastic bags for shopping. Make classrooms less noisy.不要在地上扔垃圾。不要浪费水。当你写字时要在纸的两面都要写。停止使用塑料袋去购物。减少教室里德吵闹声。

12. Even worse, they pour dirty water in to rivers.更糟糕的是他们排放污水到河流里。

13. The most important question in the world today is pollution.当今世界最重要的话题就是污染问题。

14. The amount of water which is suitable to drink is less and less.适合人类喝的水是越来越少了。

15. We need to protect Earth because it is our home.我们需要保护地球因为它是我们的家。

16. They throw rubbish into rivers , too.他们还乱扔垃圾到河流理去。

17. It's everyone's duty to love and protect the environment.爱护和保护环境是每个人的责任和义务。

18. Without the shade from trees, Earth would get too hot to live on.没有了树荫，地球将会变得太热而不能生存。

19. We don't need to do big things—we can start out small.我们不需要做大事，我们可以从小事做起。

20. We should plant more and more trees in order to live better and more healthy in the future.为了将来我们的生活过得更好、更加健康我们应该种更多的树。

21. It's our duty to save water.节约水是我们每个人的责任。

22. We should take many measures to stop pollution.我们应该采取许多措施去停止污染。