I contribute to society. Composition. I beg you!

If you want to write it yourself, you can consider it from these angles

You can also make money by selling the bottles...or you can use the waste paper, waste homework papers, and papers in the class. , notebooks, collect them together...the money you sell is used as class fees, and it can be used as a contribution to environmental protection. You can also organize the whole class to write some environmental protection slogans, papers, cartoons... for social promotion.

Or if you don’t organize the whole class to pick up white trash on campus, you can do whatever you can, and environmental protection depends on everyone!

If you don’t want to write it yourself, just copy one below

Give me back the blue sky

Ancient poets wrote about the sky, “The river and the sky are the same color without dust”; modern writers wrote about the sky, "The blue sky is spotless and crystal clear."

It is a pity that we rarely see such beautiful "sky" now. Especially in cities or industrial areas, the air is smoky and hazy all day long, which is really unpleasant. Faced with all this, you may not be able to help but sigh: "Fresh, refreshing, and clear atmosphere, where have you been? Quickly cure the "disease" of the atmosphere and give me back the blue sky and red sun!

We do have a lot to do, the most important thing is to try to reduce the emission of pollutants.

Smoke and dust are mainly produced by the incomplete combustion of coal and oil. Improve the combustion method to ensure that the fuel is fully burned. , can greatly reduce the amount of smoke and dust generated.

Try not to burn loose coal, develop coal gasification and liquefaction, and wash and process the fuel containing a lot of ash and sulfur before using it. Pollutants must be recycled, processed, turned into benefits, and reused through absorption, catalysis, adsorption, condensation, etc.

Even pollutants that escape into the atmosphere must be managed to reduce their harm. We must strengthen urban greening, plant more flowers, trees, and open more parks and boulevards.

From the perspective of stopping global warming, we must control the growth of greenhouse gases, especially carbon dioxide gas. , we should try to use natural gas as fuel. If we can eliminate small chimneys in each household and implement centralized heating or joint production of power supply and heating, we can save fuel and reduce carbon dioxide emissions.

The world. If the amount of secondary reuse of aluminum in each country is doubled on the current basis, 1 million tons of pollutants can be reduced into the atmosphere a year.

There are more than 400 million cars in the world every year. Approximately 1.83 billion tons of carbon dioxide will be emitted. In order to reduce greenhouse gas emissions from cars, in addition to limiting the number of cars, saving fuel consumption, and installing purification devices, we must also try relatively clean fuels such as methanol and ethanol, and develop public transportation. Tools and electric vehicles.

Finally, the most fundamental way to reduce air pollution is to develop and utilize clean new energy, such as nuclear energy, solar energy, wind energy, biomass energy, geothermal energy and other clean energy sources with abundant reserves. , has great development prospects.

The destruction of the ozone layer is a global problem. The United Nations Environment Conference decided to gradually stop the production of chlorofluorocarbons, the "culprit" in destroying the ozone layer. The lifespan of chlorofluorocarbons is 50 to 100 years. Of the 15 million tons of chlorofluorocarbons that have been lost and released into the atmosphere, only a small part has damaged the ozone layer so far. Most of the rest are still in action, and the ozone layer will continue to be damaged. And it will reach its peak in the first 10 years of the next century. As for completely returning to normal natural levels, it will take at least a century!

Atmospheric pollution is caused by human activities, and ultimately it is humans themselves. It’s just that time waits for no one. We’d better take decisive action from now on to purify the atmosphere and return our blue sky!

Cherish the source of life - water

Yes! The vast sea, the vast lakes, the endless rivers, the majestic glaciers, the gurgling springs... It is these all kinds of water that make our human home extraordinarily beautiful and bring beauty to the earth. Brought vitality. Can you imagine what the earth would be like without water? It will be yellow and dead. Without water, there would be no plants, no animals, and no people. Water has given birth to life on earth and human civilization. People's lives and industrial and agricultural production are inseparable from water. Water is the source of life and the lifeblood of the economy!

People regard water as a free gift from nature to mankind, and they use it and enjoy it to their heart's content.

But after entering the middle of the 20th century, water began to become a scarce commodity, and it was an irreplaceable scarcity! More and more cities are reporting water shortages! The United Nations Water Conference in 1977 warned that water will soon become a profound social crisis, and the next crisis after the oil crisis will be water. The water crisis is becoming one of the most important and urgent environmental issues facing mankind.

I remember seeing a movie like this before: In a mountainous area in China that is very short of water, water has to be fetched from dozens of miles away. When it rains, everyone drains all the containers in the house. Moving it out to collect rainwater, but we are still wasting and destroying water resources. Isn't this equivalent to a crime? I once conducted an experiment and found that if you wash your hands normally, you only need about 0.5 kilograms of water, but if you wash your hands in a wasteful way, you will use about 2.5 kilograms of water, which is about 5 times the amount of normal hand washing!

Facing the challenge of water, we must clearly realize that water resources are limited, and nothing in the world can replace water! In history, there are many places where oases turned into deserts and cities turned into ruins due to the depletion of water sources. For example, the ruins of Loulan Ancient City in the Taklimakan Desert and the ruins of Tongwan City in the Mu Us Desert are witnesses. A once prosperous shopping mall on the ancient Silk Road, and a once prominent capital of the Xia Kingdom, are now submerged in quicksand due to the lack of water. If there is no water in a place, people can move to another place. But if all the clean water on the earth is contaminated and exhausted, where should people move?

Now, we must face the facts, especially in a country like ours, one of the 13 water-poor countries in the world. The per capita water resources are very small, and coupled with serious pollution, the water resources we rely on for survival are constantly in short supply. deterioration! However, more water makes people waste and destroy it. I once read a piece of information that surprised me: to produce the same amount of food, my country uses twice as much water as the United States; my country's water consumption per 10,000 yuan of output is more than double that of developed countries!

I firmly believe that as long as we cherish and care for water resources. If we manage it well and use it well, without abusing it, without wasting it without polluting the water quality, and by properly deploying and using it, coupled with some science and technology, we will continue to expand water sources. Our descendants will no longer have to worry about water shortages, and the future of the world will be bright. It will definitely be better!