Protect the planet, we must act

Today, we took a physics class and learned the dispersion of light and the lesson of spectroscopy. And, we also recognize infrared rays that are more "red" than red, and ultraviolet rays that are more "purple" than purple. But both lights are invisible.

Ultraviolet light is a kind of light that is widely used. Specifically, it can synthesize vitamin D in the human body, promote the absorption of calcium, and can be used for banknote detection, sterilization and the like. But at the same time, it is a very powerful light, especially the part that is harmful to biology. However, humans have lived on Earth for almost a few million years. Why?

This is because, on the surface of the atmosphere, there is another layer of things that protects us - the ozone layer. Although the ozone layer in the ozone layer is extremely small, it has a very strong ultraviolet absorption function and can even absorb UV-B.

Therefore, fortunately, we humans have survived and created a glorious culture of millions of years. Therefore, the times are constantly improving. Today, people have invented electric ice cubes, air conditioners, etc., all kinds of high-tech and convenient electrical appliances, so that people can enjoy cold drinks, environment, etc. in the hot summer days. It is very comfortable to enjoy the convenience of these appliances, but they have thought that these appliances are slowly pushing people into the abyss.

People use all kinds of resources unrestrainedly, abuse all kinds of substances harmful to nature, create things that make them feel comfortable for a while, do not pay attention to the environment, and as a result, nature retaliates against humans - in 1985, British scientists observed An ozone hole appears over the Antarctic and is confirmed to be directly related to the chlorine atom produced by the decomposition of Freon.

Do you know what Freon is? It is the "culprit" that is destroying the earth! Do you know where it exists? It is in your freezer and air conditioner! It is a kind of refrigerant, but due to the large amount of use, the chlorine atoms it generates are concentrated in the sky above the Antarctic, consuming ozone substances, causing the ozone layer to be destroyed, resulting in the appearance of ozone holes in the Antarctic!

In 1994, the ozone layer destroyed over Antarctica reached 24 million square kilometers. The ozone layer over the northern hemisphere was thinner than ever. The ozone layer over Europe and North America was reduced by an average of 10% to 15%, and even over Siberia by 35%.

Scientists have warned that the extent to which the ozone layer on the planet has been destroyed is far more serious than most people think. Today, the area covered by the ozone layer on the planet is getting smaller and smaller, which also makes the ultraviolet light "organic."

A large amount of ultraviolet light enters from the ozone hole, accelerates the melting of glaciers, raises the sea level, and the ancient virus that has been frozen for thousands of years may be released. Some island countries will face the tragedy of being submerged, and the land area will be less and less. If this continues, the earth will Suffered from the disaster.

Let our fellow citizens living on earth, let us save the earth! Do you have the heart to erase the millions of years of civilization created by mankind into one worry? At that time, if the ozone layer is gone, human beings cannot tolerate the strong stimulation of ultraviolet rays, so they cannot live on the ground and can only live underground. Even so, by the time, the skin will be burned by ultraviolet rays every day! Is it worthwhile to sacrifice all human beings for the convenience of oneself in life?

If you don't want to happen, you can't do it now! As long as it is not very hot, try not to open the air conditioner!

do you know? If people all over the world don't need a day's air conditioning, then they don't know how many chlorine atoms are blocked!

The earth is finally hoped to be saved! Now governments around the world have implemented a scheme to control Freon emissions!

Ladies and gentlemen, the earth has given us such a rich and generous material life, and we also need to care and love it!

Let us use our own strength to guard the earth together!

The second day of Huaqiao Middle School, Xiaolan Town, Zhongshan City, Guangdong Province: He Wei