In most parts of the world, many students help their school make less pollution. They join “environment clubs”. In an environment club, people work together to make our environment clean.

     Here are the things students often do.

      No-garbage lunches! How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the class that makes the least garbage and report it to the whole school!

    No-car day! On a no-car day, nobody comes to school in a car, not only the students but the teachers as well! Cars give pollution to our air, so remember to do such things: walk, jump, bike or run! Use your legs! It's very fun.

    Turn off the water! Do you know that some toilets can waste twenty to forty tons of water an hour? In a year, that would fill a small river! In environment clubs, students mend those broken toilets.

    We love our environment. Let's work together to make it clean!

    This is the end of our radio programme. Wish you have a good night. This is Grace Brown.

    Do you still get free plastic bags from the supermarkets? Things have changed.

    China has banned(禁止) free plastic bags at shops and supermarkets, and people have to pay for using plastic bags. The rule started on 1st June. It came because our country tried to make litter less. Making super­thin(超薄的)plastic bags has also been banned.

    The Chinese once used about 3 billion plastic shopping bags a day, and they have caused pollution of the environment. The bags have become a main cause of plastic pollution because they are easy to break and people throw them away here and there. So the Chinese people are encouraged to bring their own bags for shopping.

    What kind of shopping bag is the best to bring? Some students in Chongqing have a good idea. They make their own shopping bags. They use old clothes to make cloth bags(布袋), and send them to their parents as presents. They also ask their parents and friends to use cloth bags instead of plastic ones. They think it is their duty to protect the environment.

One day, you open the fridge and find some moldy (发霉的) food. But before you can throw it away, your mother stops you. She doesn't want to waste it, so she cuts off the moldy part and eats the rest. Is it safe to do this?

Mold can grow on almost all kinds of food. It is usually green, white, black or gray. Mold makes food soft and changes its color. Moldy food tastes quite bad and it's not safe to eat.

If you find mold in soft food, just throw it away. Soft food, such as bread, tomatoes or hot dogs, usually contains(含有) water, which allows mold to grow easily below its surface. Bacteria (细菌)can also grow along with it.

But it's easy to remove mold from hard food because mold can't grow very deep inside this kind of food. According to BBC news, you should cut about 2.5cm around and below the mold to remove it. It's OK to cut the moldy parts out of hard food and eat the rest. But if the food is completely covered with mold, you should still throw it away.

Most kinds of mold are bad for us. But some kinds of mold can be used to make food. For example, penicillin(青霉菌) can be used to make many types of cheeses , such as blue cheese. These cheeses are safe to eat and they're quite delicious as well.

Glass frogs （玻璃蛙） are not really made of glass，but their skin is transparent，just like glass.In fact，the skin on the underside （底部） of a glass frog is so transparent that you can see the inside of its body.Without using an instrument （仪器），you can see the frog's heart and other organs（器官）.Sometimes you can even see the food moving through the body.

These unusual﹣looking frogs can be difficult to find in the rain forests of Central and South America.The skin on their fronts and the green color of their backs often blend in （融入） with the leaves（叶子） they rest on.Also，they are just about the size of a coin.

These frogs have an interesting way of catching insects.Scientists believe the glass frog's back looks like the frog's eggs.If a fly （苍蝇） flies down for a meal on a frog's back，it will be in for a surprise when the glass frog opens its mouth.

The male glass frog protects （保护）real eggs.To keep away unwanted animals，a male glass frog will try to drive away other animals if they get too close.At first.the male frog makes loud noises to warn （警告） other animals to leave the area.If that does not work，the frog may fight with other animals until they give up and leave.