How harmful is a battery essay 400 words

Faced with the same thing, the same phenomenon, everyone may have different opinions. But whether we can grasp the essence of things is the most important thing for us. In the biological world, animals have different fields of vision, which affects the space and speed at which they can walk and fly.

As human beings, we are the same, and our vision is different, which affects our "space" and "speed".

When an ordinary seed fell at Darwin's feet, he picked it up, and decades later, "The Theory of Evolution" was unfolded; When a firefly flew by Tagore's window, he gazed carefully, and soon the beautiful psalm reached people's ears; When a ray of light cast a shadow behind Einstein, he pondered it repeatedly, and a few years later, the quantum theory of light shocked the world.

These things that can be seen every day make people realize the mystery of heaven and earth, and taste the charm of life. Indeed, it is the many subtle things that make up the world, and it is also from them that people perceive the greatness and humility of personality. In the face of the same phenomenon, people's ideas and concepts are different, and their views on things are different.

Different visions determine our differences.

As high as the heart is, it can fly as far as it can fly. The eagle spreads its wings and flies high, and sees the vast sky, so it flies in the high sky; The tiger leaped and saw the boundless forest, so he ran through the rich fields; The carp swam happily and saw the magnificence of the Dragon Gate, so they swam hard in the sea. They saw a big, big dream, so they performed the most beautiful dance on their own stage.

On the contrary, the chick saw the bustle of the wood, so he cooed there; The ducks saw the joy of the pond and swam around the small lake.

When an apple falls to the ground, Newton "sees" the gravitational pull; When bacteria exposed to dust do not grow properly, Fleming discovered penicillin; Marie Curie, the discoverer of radium--- all of this has illustrated the key role of vision for us time and time again. The truth that sees and discovers it is the most precious thing. When a new problem or new phenomenon unfolds in front of us, we should expand our horizons and see higher and farther.

Only then will it be successful.

Expand our horizons, have you learned?

To waste time composing.

Word. Don't waste time composing.

Word. An inch of time is an inch of gold, and Pavlov also said: "In the world we are."

You only live once, so you should cherish your time. It is necessary to live an authentic life, to live a life worth living. "Time.

Of course, it is precious, everyone should cherish every second and do something meaningful and valuable.

Avoid doing nothing and mediocre life. If the young don't work hard, the boss will be sad, don't wait until you're old.

Remorse. In today's impetuousness, it is difficult for anyone to realize the preciousness of time; The fast-paced life makes people even more unscrupulous.

And other things, completing tasks, is more important than anything else, which makes the already impetuous society even more numb and unbearable.

Finish. Think about what our predecessors did: When Lu Xun was twelve years old and studying in a private school in Shaoxing City, his father was suffering from it.

Seriously ill and his two younger brothers are still young, Lu Xun not only often goes to pawnshops and pharmacies, but also has to help his mother with her family.

Business; In order not to interfere with his studies, he had to make a precise schedule. Since then, Lu Xun has been squeezing almost every day.

"Time. He said: Time, like water in a sponge, as long as you squeeze it, there is always it. Lu Xun reads.

He has a wide range of interests and loves to write, and he is also deeply interested in folk art, especially legends and paintings.

Hobby; Because he has a wide range of knowledge and learning, time is very important to him.

He had been sick all his life, and his working conditions and living conditions were not good, but he would not stop until late at night every day.

Yes, there is not a lot of time, but just but, how many people can cherish time?

A student in my class was tired when he came to school every day, and he fell asleep during class.

The teacher was embarrassed. After school, other classmates quickly went home to do their homework, but he went straight to the Internet café.

Time is precious, and there will be no more today after today; We always want to do today's things tomorrow, but tomorrow is tomorrow, tomorrow is so much! When the sun goes down, there will be no more sun today, don't be obsessed.

Delusion is plentiful, and when you feel pressed for time, you can't talk about anything.

Cherish your time and don't let your life be useless!

Some people say that used batteries should not be thrown away, since it will seriously pollute the environment. Individual classmates but.

Many people have different opinions on this issue, and I have one opinion as well.

My opinion is that batteries should not be discarded indiscriminately, because waste batteries are small but very harmful. As we all know, waste batteries mainly contain heavy metals such as cadmium, lead, mercury, nickel, zinc, manganese, etc., among which cadmium, lead, and mercury are substances that are more harmful to the human body.

Waste batteries are a big killer that endangers our living environment! A small button battery can pollute 600 cubic meters of water, which is equivalent to the amount of water a person drinks in a lifetime; A No. 1 battery rotting in the ground can make one square meter of land lose its use value and cause permanent pollution.

In nature, mercury in discarded batteries can slowly spill out of batteries, enter soil or water sources, and then enter the human body through crops, damaging human kidneys. Under the action of microorganisms, inorganic mercury can be converted into methylmercury, which gathers in the body of fish, and after people eat this fish, methylmercury will enter human brain cells, causing serious damage to the human nervous system, and the serious ones will go crazy and die.

Start from me, start from every little thing around you, and protect the ecological environment. It is the responsibility and obligation of each of us to care for the surrounding environment and participate in the classification and utilization of waste batteries.

To protect our planet, to protect our nature is to protect ourselves!

If you can't mess with the old battery, then the battery will pollute the air and pollute our world, and it will not look good.

What you said is very good for us, because we should protect the environment, this is the best choice for us.

Some people say: "Waste batteries can't be thrown away, which will pollute the environment." But some people don't think so, Xiao Ming said: "Throwing away waste batteries will not be harmful, you see, so many people litter, I don't see much harm!" ”

I have an opinion on this issue.

In fact, the harm of waste batteries is very great, a very small button battery thrown or buried in the land, it will destroy 600 square meters of ground, a No. 1 battery buried in the soil, so that the land is the value of use. Therefore, we can't waste batteries indiscriminately, and the harm of batteries is great.

A small battery thrown in the water pollutes 60 square meters of water, which is the amount of water a person drinks in a lifetime. That's a lot of money.

Batteries are a big killer of human beings, waste batteries contain a lot of things, especially bad for the human body, if the things in the battery pollute the air, as soon as you breathe, those things will enter your body with your nose or mouth, so you will get a lot of unknown strange diseases, and then you will slowly die.

Let's protect the environment together, join the classification of waste batteries together, and not littering waste batteries is also a civilization.

Let us work together to protect the beautiful mountains and rivers of the motherland, and let us love the earth where we live, so that the global village we live in will be more beautiful and beautiful.

In today's society, there are countless things that use batteries. For example, mobile phones, computers, fans, electric toys, and even airplanes, spaceships, etc. all use batteries. It can be said that batteries are an essential item in our lives.

In my opinion, it is not right to litter batteries. Although it is small in size and small in mass, it contains a variety of metallic substances. When batteries are discarded in nature, the mercury contained in them will slowly spill out, enter the soil or water source, and then enter the human body through crops and damage the kidneys.

Not only that, according to relevant data, a battery the size of a button can pollute 600,000 liters of water, which is equivalent to the amount of water a person drinks in a lifetime. A battery rotting in the ground can make one square meter of land lose its use value. Therefore, people often refer to used batteries as "pollution bombs".

What's even more terrifying is that mercury can be converted into methylmercury by microorganisms, which can accumulate in the body of fish. If a person eats this fish, methylmercury will enter the human brain cells, causing serious damage to the human nervous system, and in severe cases, it will go crazy and die.

The harm of littering batteries is so great! Now I must lead by example, do not litter the battery, and also call on my friends not to litter the battery, and then tell others that people will definitely take care of the environment.

battery, we use it in every household. ...... in a flashlight, in an alarm clockIt's everywhere. But, you know what?

Batteries that have been used up should not be thrown away because there are many toxic and harmful substances in the batteries: lead, manganese, pickaxe, mercury, cadmium, ......But some students said, "Isn't it just a small battery?"

How harmful can it be? Aren't everyone else littering? It doesn't necessarily hurt much!

If you think this student is right, you are very wrong! Think about it, if every person in China throws away a battery every day, how many batteries will China's 1.3 billion people have to throw away!

It is said that when a coin cell battery is discarded in nature, it can pollute 600,000 liters of water, which is equivalent to the amount of water used in a person's lifetime. In the most threatening to the natural environment of several substances, the battery contains mercury, lead, cadmium and other kinds, mercury has a strong toxicity, the central nervous system of the human body is very destructive, the Minamata disease that occurred in Japan in the fifties of the last century is caused by mercury pollution; Lead can cause nervous disorders, nephritis, etc.; Cadmium is very easy to cause chronic poisoning in the human body, and the main diseases are emphysema, osteomalacia, and anemia, which is likely to paralyze the human body; Lead is the most difficult to excrete after entering the human body, affecting kidney function. If waste batteries are mixed into domestic garbage and landfilled, over time, the leached heavy metals may pollute groundwater and soil, and then enter fish and crops, destroying the living environment of human beings, and indirectly threatening human health.

If a No. 1 battery rots in the ground, it can make 1 square meter of soil lose its use value. It can be seen how harmful the battery is!

Please don't litter waste batteries in the future!

Hazards of Waste Batteries: When the chemicals inside the battery are completely reactive, the battery can no longer be powered and becomes a waste battery, which is usually thrown away and bought with a new one. Most people would say that this is quite normal.

But they didn't expect that even with that gesture, they were also destroying their home, the earth. One might ask, "What's so great about this little thing for the earth!"

What else is there to say about sabotage? "Batteries don't look that destructive, but you can't look at everything on the surface. Waste batteries contain a large amount of heavy metals such as mercury, cadmium, manganese, lead, etc.

When the surface cortex of the waste battery is corroded in the sun and rain, the components in it will penetrate into the soil and groundwater, once people eat the crops produced by the polluted land or drink the polluted water, these toxic heavy metals will enter the human body, slowly deposited down, causing a great threat to human health! It has been measured that a No. 1 battery rotting in the soil can make one square meter of land lose its use value; A single button battery can contaminate 600,000 litres of water, which is equivalent to the amount of water a person drinks in a lifetime. Nearly 5 billion people in the world to count each person to lose a battery every month, a year to accumulate 60 billion batteries, the destructive power to the earth can be said to be great, the consequences of its harm to human health are even more unimaginable, according to statistics, only Beijing every year due to waste batteries and mercury into the natural environment has reached tons, this number can not help but headaches.

Therefore, used batteries cannot be discarded at will. In terms of waste batteries, all countries attach great importance to them. In addition, all kinds of zinc-manganese batteries produced in developed countries are mercury-free batteries.

Developed countries are also not allowed to import mercury-containing batteries. Therefore, China's mercury-containing batteries cannot enter the developed regions of Europe and the United States.

Dear Headmaster:

Hello! I am a student in the class. In the six years of study and life, the school and teachers have given us meticulous care and education, so that we have grown from an ignorant child to a qualified primary school graduate.

Now, we're leaving the school, leaving everything there. I'm a little reluctant.

Now, our school is very well developed, with a computer room, a nature room, and a language room, and it has become a well-equipped school, and the teachers are also carefully selected to come in, so everyone can learn here easily and happily. However, as a school and as a teacher, the work will not be perfect. Therefore, I would like to make a few suggestions for schools here:

1. Send more people to manage the staircase, especially when raising the flag and doing exercises to go up and down the stairs, to maintain order and prevent the corridor from being crowded and blocked. If you can, stagger the time for everyone to go up and down the stairs, let the upstairs go down first, and then go downstairs after you get down. In this way, the corridor will be much looser, and it is not easy to have accidents.

2. Go to the language room and art room for English and art classes, and don't let them be empty. Installing computers in classrooms as soon as possible will enable teachers to display relevant materials more vividly and vividly during classes.

3. Resume the "Life Practice Week" activities so that students can learn to take care of themselves and get along with others. You can also take everyone to military training, so that we can experience the difficulties, and we can also exercise our bodies and hone our will.

4. Open the library, students who want to borrow books can apply for a "library card", and a few administrators can be assigned in the library to check and supervise the reading situation, and you can also investigate what kind of books everyone likes among the students, and then buy some back, which not only broadens our horizons, but also cultivates our awareness of loving books, protecting books and abiding by the law, which is really a double win!

5 Set up more courses in physical education class, such as playing football, basketball, table tennis, etc., so that we can master more skills, and with long-term exercise, our body will be better.

Dear Principal, in order to make our growth and life better, please accept my suggestions!

Finally, I wish you well:

In good shape! Works well!