We have only one earth. It is the only environment for humans, animals and plants to live or grow in. However, we are polluting our earth every day. Good news is that the whole world has realized the serious problems and has taken action to fight against it.

    World No Tobacco Day (May 31)

    The first World No Tobacco Day is April 7, 1988. Since 1989, it was changed to be May 31st every year. The purpose of the World No Tobacco Day is to encourage people not to smoke.

    World Water Day (March 22, 1993)

    United Nations named 22 March as the first World Water Day in 1993. It's a day to celebrate water. It's a day to prepare for how we manage water in the future. It is celebrated around the world every year.

Earth Hour ( 2007)

    Earth Hour started for the first time on March 31, 2007 in Sydney, Australia. Since then, the last Saturday of every March was named as Earth hour day that year. On March 19, 2016, more than 350 famous buildings in 178 countries around the world turned off the lights for one hour to remind people to save electrical power.

    Actions in China to save our environment

    Smoking is not allowed in all indoor public places from 2014.This is the first time for China to care about personal health in public places.

    Ban(禁令) on free plastic bags. Since June 1, 2008, free plastic shopping bags are not allowed to provide in all supermarkets, shopping malls, and other places. It is to encourage people to use cloth bags or baskets for their shopping things.

    British people pride themselves on their polite manners towards one another in public. They often use the word 'sorry'—even when they don't really mean it! Usually, if they want to ask a stranger for the time, they would start by saying 'Sorry to bother you. Do you know what time it is?' If they're five minutes late for an appointment (约会), they would generally greet the person by saying 'Sorry I'm late!'

    They use the word 'sorry' in so many different situations that the meaning of the word has changed a little over time. The two main dictionary definitions (释义) of 'sorry' are: 1) feeling sad for someone else because of their problems or bad luck; 2) feeling regret because you've done something wrong. Now, think about this. Normally, when they want to ask a stranger a question, they start with 'Sorry to bother you'. In this situation, they aren't saying sorry because they feel sad for that person or because they feel regret.

    So what does 'sorry' really mean? And why do British people use it so much? Well, in the British culture, saying 'sorry' is a way to be polite, especially to people who they don't know very well. It's also a very clever way to get what they want. In a recent experiment, an actor went up to a different strangers on a rainy day to ask if he could use their mobile phones in order to make a call. When he went up to one group of strangers and asked them without saying 'sorry' first, he was only 9 per cent successful in borrowing their phones. However, when he said 'sorry' to another group of strangers about the bad weather before asking if he could use their mobile phones, he was 47 per cent successful. So maybe saying 'sorry' is not just being polite, but it is also a good method to get what they want too!

    It is said that the eyes are "the windows of our soul". Beautiful and bright eyes not only show a good health but also make you look very attractive. However, to have healthy eyes, you have to look after them properly. Your eyes need taking good care of.

    Be careful with your diet. First, eat food that is good for your eyes. They are fresh fruits, vegetables, fish, eggs, and milk. Besides, a regular amount of vitamins A and B2 should also be taken.

    A regular and sound sleep is a must. It relaxes your eyes and gives them enough rest. Sleep not only helps repair the tired body. Usually, you must sleep for at least seven to eight hours every day. Loss of sleep can give you dark circles under the eye.

    You must exercise your eyes every day. Blink(眨眼) your eyes at regular periods, which makes the eyeballs full of water and gives them a good wash.

    We use our eyes in many wrong ways. Fox example, if a small thing goes into our eye we start rubbing it, which is wrong. Rubbing can hurt your eyes. Don't read or write in poor or bright sunlight. Always use sunglasses as sunlight can cause eye tiredness. Light should not shine directly in your eyes.

    Too much reading, watching TV or working on the computer can also cause eye tiredness.

    Remember to always take care of God's most beautiful gift to you. Your life will be very colorless without your eyes.