A composition that you have experienced personally should have a description of the scenery.

There is a world-famous company whose system has a self-contained picture: blue sky and white clouds, fragrant grass, which makes people feel that heaven and earth are almost connected and handed over harmoniously. This picture was bought by Microsoft from a photographer at a high price as a landscape for many computer wallpapers.

Once, many people regarded it as a beautiful scenery and were intoxicated by it. However, what now?

When the photographer returned to his original place, when the camera was aimed at the previous direction again, it was a completely different "landscape" from his previous shooting: it was dark, grass was everywhere, the blue sky was stained with layers of gray halos, the clear and thorough air became hazy and faint, and the distant world was looming in the fog gauze. Faced with this situation, people are very surprised and can't believe that this place will be the beautiful scenery they have seen before. The blue sky has turned into a gray curtain, and the grassland has turned into a barren grassland, which is no longer full of vitality, poetic and faint fragrance floating around through the photos. ...

All this is caused by environmental pollution, and so is the smoggy weather in Beijing these days. People struggle whether the fog is Beijing or London. It seems that London's status as a foggy city has been "stormy".

Last Saturday, Beijing's PM2.5 reached heavy pollution, with an index of over 800. Air should bring freshness, vitality and life to people, but environmental pollution has made air a "double-edged sword", which can make people alive and can be easily taken away. There used to be air pollution in Britain, and thousands of people died. However, at the London Olympic Games, there was no smog weather in the foggy city of London, and it was replaced by good air quality. A reporter suffered from respiratory diseases, and as a result, he recovered after staying in England for a few days.

During the Beijing Olympic Games, the government ordered the closure of some factories or several production lines. At that time, the air quality in Beijing was particularly good, but after the Olympic Games, the factory resumed work, and the air quality dropped again, reaching the bottom. Someone lamented: "I really hope that even if China doesn't open the Olympic Games, the air quality will be so fresh."

A landscape often has another "landscape", which may be the past or the future. You never know what this landscape was like in the past and what it will be like in the future. People can't choose between "blessing" and "disaster", and they can't avoid it. However, the decision of "green" and "smog" really belongs to everyone.

I hope it will help you and be adopted.