听力测试第五节——H

Look up at the night sky and you may wonder why you can't see many stars anymore. Well, this is mainly because of light pollution. Electric light can be a beautiful thing, guiding us home, keeping us safe and making our homes warm and bright. But too much electric light at night may cause slight pollution, bringing many problems.

First, light pollution hides stars that make the night sky beautiful. When we can't see them, we miss chances to learn about our universe. Second, it wastes energy. We'd better control how much light we use every day. Next, light pollution influences our sleep, because we need a dark environment to sleep well at night. Last, it is also harmful to birds. They often follow moonlight to find their way, but bright light may mislead them. They often get lost and even die.

Now let's talk about how to deal with light pollution. Remember to turn off lights that are not necessary. Talk to your family and friends about light pollution. You might think your actions are not important, but that's not true. Small actions can add up. So do you want to see the shining stars again? Let's work together and the shining stars will return to the night sky one day.