Abstract

open class in the older - preparatory group on the topic: "Planet Earth is in danger"

(action "Earth Hour")

Completed by: educator MBDOU

« Kindergarten No. 15"

Ilyushina N.N.

2018

Target: To consolidate the knowledge of children about nature, about our planet. To give an idea that our planet Earth is now in danger. Develop ingenuity, logical thinking.

Tasks:

1. To develop the ability to carry out an independent search by solving environmental problems.

2. Systematize and consolidate the ecological knowledge that children have about relationships and dependencies in living and inanimate nature.

3. Form awareness of the need to protect the environment.

Equipment : Presentation, didactic game“Sort the garbage”, didactic game “Living-inanimate nature”, game “What is good and what is bad?”, For experiments: balls, flags, a jar of water, glasses, funnel, gauze.

Preliminary work:viewing illustrations of environmental content, conversations with children, medals with the image of the planet Earth.

Lesson progress

The children, along with the teacher, enter the hall.

Educator: Guys, let's say hello to our guests, give our smiles, and let everyone have a good mood during the day.

Reb.

Hello sun!

Hello sky!

Hello all my Earth!

We woke up very early

And we welcome you.

If everyone smiles

Good morning will begin.

Children sit down

Educator: Today we will talk about the fact that the whole planet - common Home where we live from birth. Today we will also talk about the fact that we must protect our home.

Guys, what is the name of our planet on which we live? (children's answer, Earth).

Guys, look how beautiful our planet is. And what form does it have? That's right, the shape of a ball. Only this ball is so big, it takes many months to go around it. Guess the riddle:

We will find cities, seas,

Mountains, parts of the world.

Fits on it

Whole planet.

(The globe)

That's right, the globe(model of our planet Earth, in a reduced size).See how multi-colored it is, what does each color stand for?

The globe is green . These are forests. Look how many forests there are in Russia. The largest forest on Earth is the taiga. The forest is trees, from which a huge number of different objects are made, paper on which books are printed, notebooks and albums are made. Berries, mushrooms grow in the forest, various animals live. The forest is a natural wealth, there is a lot of it, but it must also be protected.

On the globe is dark yellow and yellow color.These are steppes and deserts. In the steppe, the vegetation is very poor - grass and stunted shrubs, in the desert there is only one sand.

On the globe is Brown color.These are mountains: the Ural and Caucasus mountains (I show on the globe). Minerals are mined in the mountains. This is what is in the Earth and what is very necessary for human life: coal, various ore, which is necessary for the manufacture of metal. Oil, gold and diamonds make up the wealth of the country.

There are many on the globe of blue color This means that there is a lot of water on our Earth. Here the rivers flow, they are drawn with a thin, blue line. There are many rivers and they all flow together and form seas. There are fewer seas than rivers. And the seas turn into big oceans. We read on the globe that the Pacific Ocean is here, probably, there are never storms and shipwrecks on it, it is always quiet and calm there.

The globe is white. It's snow and ice. This is Antarctica. There is eternal cold, snow, ice and only penguins live permanently. And people settle only for a while to explore this mysterious permafrost continent.

Educator: Our planet is unique. Planet Earth common home.

Let's talk about our common homeverse. "House under a blue roof"

1. Like a roof over the earth,
Blue skies.
And under the blue roof -
Rivers, mountains and forests.
Oceans, ships,
And meadows, and flowers,
All countries and all peoples
And, of course, me and you.

2. Circles in the blue sky
Our huge round house.
Under one blue
We live under a common roof.
House under blue roof
Both spacious and large.
In this house we are neighbors
And the owners are with you.

3. Together we are with you in the answer
For a wonderful home.
Because on the planet
All yours and all mine
And fluffy snowflakes
And the river and the clouds
And paths, and blades of grass,
And water from a spring.

4. The house is spinning around the sun,
To keep us warm
So that every window
It could illuminate.
For us to live in the world
Without cursing, without threatening
Like good neighbors
Or good friends.

Educator: Guys! Of course, our planet is beautiful and amazing, favorable for life. Seas and oceans splash on its surface, rivers and streams flow, wide plains spread, green forests rustle, high mountains rise. Our planet has a beautiful and diverse nature.

Are you familiar with the word "nature"? And what does it mean? (The world in which we live).

Children express their knowledge of what nature is and give examples: the Sun, air, water, plants, animals, birds, etc.

Educator: The whole nature of the Earth can be divided into two huge world : world inanimate and living world. Explain how they differ? (living nature is what moves, grows, dies and multiplies, and to non-living nature - stones, water, mountains)

Dynamic game "Living - inanimate nature"

The teacher shows the children on the screen pictures depicting animate and inanimate nature and suggests dividing them into two groups: live - stomp, inanimate - clap.

Educator: Guys! Would you like to see how astronauts see our amazing planet from their rockets?(On the screen is a picture of the planet as seen from space).

Educator: But not everything is so beautiful on our planet - Earth. The planet is in danger. It has many sore spots. How did it happen? (Children answer). Yes, people have built many plants, factories, power plants. The smoke from the enterprises pollutes the air that comes out of the pipes, the waste from the factories is poured into the river, all living things die from this.

Look! How the planet will look from space (the image of a dirty planet is on the screen). It has become all black, the planet has turned into one big dump, garbage is flying everywhere, there is a fetid smell, plants have died, the water has become muddy and dirty on Earth.

Let's talk about the most important

It was scary to look at the ground

The water is getting cloudy every day

And the air - how much dirt is in it!

Once clear blue

Now he's dirty and sick

All living things can die

Earth, what have they done to you?

Educator: So what are we going to do guys? (children's answer, we will save the planet). How can we help our planet? (children's answers)

Educator: guys, do you know the distress signal? ( Answers .)

I will tell you: “SOS is a call for help. How can we help our planet? (The children exchange opinions.)

We must learn to love nature, to understand how all living beings live. This is what environmentalists do. Do you want to become young ecologists?

I need to make sure you can help save the planet from extinction. You will have to pass small tests and prove to me that you are friendly, kind and can work in a team. After all, only together we can save our common home.

Trial 1

Educator: Answer my questions:

Without which a person cannot live a single minute (answer of children, without air)

Imagine if there was no air, what would happen?

Do we see him? Maybe it doesn't exist at all? To answer all these questions,

let's explore the properties of air and conduct experiments.

Experience

The teacher takes a glass in his hands.

Guys, what do you think this glass is empty?

Let's check it out, shall we?

The teacher puts a jar of water and a glass on the table.

Turns it upside down and slowly lowers it into a jar of water. What happens? Does water get into the glass? Why not?

Conclusion: there is air in the glass, it does not let water into it.

And why did we first think that there was nothing in the glass? (transparent, invisible). This is the first property of air. Guys, we managed to see the invisible air, and now I propose to hear it.

Ball experience.

Where is the air cleaner and easier to breathe? (Children answer, in the forest.)

Why is the air polluted in the city? (Cars rev up, factories smoke.) Indeed, it is more difficult to breathe in the city, since the air in it is polluted by factories, factories, cars.

What can be done to make the air in the city cleaner? (children's answer, in factories, plants need to install filters that trap pollutants.)

Why is it easy to breathe in nature - in the forest, in the meadow? (Children answer, there is clean air.)

Why is the air clean in the forest? (There are no factories, cars, but there is a lot of oxygen.) That's right, there is more oxygen in the forest that we breathe. This is the merit of plants, because they produce oxygen. More plants means more oxygen.

What can be done to help the city clean the air? (children's answer, plant trees, shrubs.)

The game "What is good and what is bad?"

I have red and green flags. Consider the images and put flags under them. A green flag is a positive impact on nature, a red flag is a negative one.

1. Bonfire in the forest (Red flag)

2. Garbage in the forest (Red flag)

3. Broken branches (red flag)

4. Felled trees (Red flag)

5. Poaching (Red flag)

6. Planting trees (Green flag)

7. Hanging feeders (Green flag)

8. Do not pick flowers (Green circle)

9. Creating a Red Book (Green Flag)

10. Creation of nature reserves (Green flag)

2 test.

Educator. But man pollutes not only the air, but also the soil.

What harmful substances do you know?

(children's answer: Gasoline, paint, varnish, mercury and much more.)

Have you seen anywhere that harmful substances fall on the soil?

(children give examples of harmful substances entering the soil).

Correctly! It seems that they lie and do not interfere with anyone. But now it's raining! - What's happening!

(children's answers: Dirty water went deeper into the soil.)

Has the harmful substance disappeared?

(Children: No.)

If it didn't disappear, where did it go?

(children express their assumptions: into rivers, lakes, seas, oceans).

CONCLUSION: So it turns out that if the soil is contaminated, then harmful substances will definitely get into the water. Who needs water in nature? (Man, trees, animals…..)

There is not a single living organism on earth that can live without water. Water is essential for all life on earth. For example, a person can live only 7 days without water.

Where, do we have water at home and in kindergarten? (From the river, from under the ground ...)

How does a person use water? (Drinks, washes, washes ...)

And what kind of water do we need in order for us to be healthy, strong.

(pure)

Can a person drink dirty water? (No)

Why?

(There are a lot of germs in dirty water, you can get sick)

Educator: If you and I know that the water in the tap comes from the river, imagine what will happen to the river if all people leave the taps open and do not take care of the water? (The rivers will dry up, become shallow ...).

What can you tell about water? What is it like?(Fresh, sea, drinking, purified, mineral, muddy, dirty).

Where does water live? (Ocean, sea, river, lake, water pipe, fountain, etc.).

On Earth, salty - sea water is more, and fresh water is becoming less and less.

Why is this happening?(Waste of enterprises, toxic substances, garbage are dumped into rivers). (Draws the children's attention to the slide).

Educator: What can we do to make more fresh water available?

(not pollute water bodies, stop those who throw garbage , clean up after themselves garbage on the shore ). Look at the screen (a slide with a polluted reservoir). What is superfluous here?

The teacher shows a jar of contaminated water and asks the children to help purify the water.

It is suggested that children purify the water through a filter.

Experience:

We pass contaminated water through a simple filter (funnel with cotton wool). Children's attention is drawn to how the water has changed.

Trial 3

Educator: - Yes, guys, frankly, the situation is deplorable. We have polluted our land. You know that each person throws out tons of garbage every year - this is a whole truckload. There are several billion people on the planet. Very soon, if nothing comes up, humanity will have to save itself from garbage. Every day the mountains of garbage are growing, the air around them is very unpleasant and even harmful !!! - What to do (Answers of children).

Guys! Let's talk with you about what kind of second life can be given to garbage?

What can you think of? Can trash be used somehow?(Children make their suggestions)

In some countries, this garbage is sorted, different garbage is placed in different containers. For a long time people have learned to use old paper, metal and glass. There are special places - garbage collection points, where paper, glass, metal are accepted. Paper is used to make packaging material, cardboard. The metal is melted down and reused. Broken glass is recycled and added to building materials. But in our country, they also began to sort garbage into special containers.

Educator: But rubbish can be given a second life. And as guys, we can give garbage a second life.

Guys, tell me, is it possible to burn garbage?(No, it emits harmful smoke). What about digging into the ground?(Not everything rots in the ground).

Garbage can be recycled, and waste processing plants are already being built everywhere, but in order to transport garbage to this plant, it must be sorted:

Educator: And we will play the game "Separate garbage"

Held game "Separate garbage".

paper, cardboard - waste paper,

jars, bottles - glass,

plastic bottles, plastic bags,

cans, tin - scrap metal,

banana peel, potato peel - food waste

If everyone takes care of the planet, then the planet will become cleaner! I hope that you have learned a lesson from our lesson and will take care of our planet. But Nastya K. Wants to give us all one, but very important advice.

There is one garden planet
In this cold space
Only here the forests are noisy,
Calling birds of passage,

They bloom only on it,
Lilies of the valley in green grass
And dragonflies are only here
They look into the river in surprise.

Take care of your planet
After all, there is no other like it!

caregiver : now I am sure that you are the real defenders of nature, our planet. I would like to give you the emblems "Defender of the nature of the planet Earth" (emblems are awarded to the music).

Literature

1. Belavina I, Naydenskaya N. "The planet is our home. The world is around us." Methodology for conducting classes for preschoolers and junior schoolchildren. Moscow, Laida.

2. Ivanova A.I. "Living Ecology". Environmental

preschool education. Moscow, 2007

3.Molodova L.P. "Game environmental activities with children." Handbook for educators and teachers. Minsk, Asar, 2001

4. Nikolaeva S.N. Young ecologist. The system of work in the preparatory

school, kindergarten group. 6-7 years old. "Mosaic-Synthesis", 2010.

5. "The planet is our home. The world is around us." Textbook-reader on the basics of ecology for preschoolers and younger students. Moscow, Laida.

6. Pleshakov A.A. "Green house. The world around us." Moscow, "Enlightenment", 2002.

7. Ryzhova N.A. "Environmental education in kindergarten." Moscow, Publishing House"Karapuz", 2001

8. "Environmental education of preschoolers" (based on developing

forms of education) Development of classes, ed. T. V. Babynina -

Naberezhnye Chelny, 2009.

Cha from the Earth - an action for the whole world,
To make him happier in the future.
For just one hour, the lights in the house will go out,
To make the dawn brighter tomorrow
To make the air a little cleaner
To keep the streams all
To make life more prosperous
To make the world and man more consonant!

Earth hour is the time to live without fuss,
And think about what you did for the planet today?
Turn off all electricity for one hour.
You would be surprised to know how many resources you saved.

We are used to living in comfort, thinking only about ourselves.
We consume all the resources that are laid in the earth,
But they are not endless, and everything has its limit.
Write Earth Hour on your personal list of good deeds.

In the turmoil of weekdays
We forgot about her.
About our wonderful planet,
Inhabited, populous.

We draw strength from it
To have enough energy.
Not a moment of peace
We can't fix her!


Nature is the only book where every page is full of

Here she is sad, delving into her thoughts.

Here she swims, unsteady cool blows.

Still lives! Still believe people!

Here she is sailing through the stormy midnight,

Calls all people, asks

to help.

Asks for help!

Everyone knows that today our planet is in danger and if we continue to exploit it soullessly, then by the end of this century we will lose more than a third of fertile land due to erosion, a million species of living organisms will disappear, and the population will need new resources.

Take an active part in the subbotnik!

Did you like the cleanliness of the streets? Don't worry, they'll always be like this!

Dear Guys! The Earth with its biosphere is the greatest miracle, we have only one. Let's take care of our Earth! Everywhere, at every step, all together and each separately. We won't have another planet! Tomorrow Earth will be what we create it today

Maria Gagarina
NOD "Planet Earth in danger"

GOAL: Tell the children about The earth is a huge ball. A huge part of the surface of the globe is covered with water - the seas and oceans. In addition to water, there are continents - solid earth-dry where people live. Planet Earth is now in danger. To save the one you love planet, it is necessary with early age to educate children in love for nature, to study it, to handle it correctly. Demonstrate to children the role of man in the preservation and destruction of ecosystems. Encourage the ability to solve problem situations, analyze, establish private and general connections.

Dictionary activation: planet, globe, ecology, continents, globe, SOS.

Equipment: presentation on the topic « planet Earth» , globe, kerchief or scarf, d / i "what is good and what is bad" on ecology, sunflower seeds, cups with land for every child, water, watering cans.

preliminary work: reading books about different countries and continents, their climatic conditions, excursions, targeted walks.

Event progress.

caregiver: Today we will talk about a very important topic: « Planet earth in danger» .

What an amazing planet Earth! On her surface of the sea. oceans, rivers and streams flow, plains spread, green forests rustle, high mountains rise. the world around us - the earth is our common home!

(slide number 1)

caregiver: What shape does Earth?

caregiver: Yes, our the planet is a huge ball. So big that it would take days to drive around it.

Let's take a look at the layout of our land.

(looking at the globe)

If you take off into space, then from the rocket window

You will see our blue ball - beloved planet!

And now the question is simple: So why is blue

Our common home, our globe of the earth?

caregiver: Maybe you know what some seas and oceans are called?

caregiver: And what would happen to a person planet and all living things on earth if there was no water?

caregiver: But planet earth is not only water but also dry. These are huge continents where animals, birds live, where trees and flowers grow.

What is more on the globe - water or land?

Who lives in the seas and oceans?

Does anyone live on land?

And where do we live?

What is the name of the people who live in earth

What does a person need to live on earth?

Well, now about the most important thing! Is everything okay on our planet?

(slide number 2)

caregiver: What do we see?

The water in the river was polluted and fish died from this, many plants and animals perish.

Take a look at our the earth is scared: the water becomes cloudy with each reaper.

And the air! how much dirt is in it.

Once clean and blue, now it's dirty and sick.

Our the planet is in danger! she has a lot "sick" places!

(the teacher ties a scarf on the globe (bandage) as if an ear or tooth hurts)

Why do you think planet"sick" ?

There are many factories, factories, the air is polluted from them. Waste from factories is poured into rivers, thereby polluting them. Because of this, all living things die and people get sick!

(slide number 3)

*- didactic game "What's good - what's bad"

(divide the pictures into two groups and explain your choice)

* - physical education « Earth is our common home»

Here the earth is our common home. (arms above head mimic the shape of a ball)

There are many neighbors in it. (Right hand to the side, left hand to the side)

And shaggy goats. (show horns)

And fluffy kittens. (stroking belly)

And meandering rivers. (make waves with hands)

And curly sheep. (wagging "tail")

Herbs, birds and flowers. (showing with hands)

And, of course, me and you. (hands on chest and sides)

caregiver: What do you think, our city in danger? What threatens him?

caregiver: Do you want to know the opinion of adults on the issue of nature protection in our city?

(children interview adults, asking pre-prepared questions.

for example: - How do adults deal with the pollution of our city? What, in your opinion, should be saved first of all in our city? What do you personally do to protect nature?

caregiver: guys, talk to your parents, ask what they are doing to preserve nature in our area?

What can we do for our city?

caregiver: I suggest you plant flowers for our site. What is needed for this?

(slide number 4)

(children plant sunflower seeds together with the teacher)

Related publications:

Photo report about the concert "Living Planet Earth" Video 2017 for our preschool department was rich in various creative activities, including competitions. So, with prep kids.

Synopsis of the GCD on the non-traditional drawing technique “Planet Earth. View from space, senior group. Objectives of the lesson: 1. To form skills in non-standard.

Synopsis of GCD on cognitive development "Planet Earth in danger" Municipal educational preschool institution "Kindergarten No. 11 "Teremok"" of the city district of Kokhma Synopsis of continuous educational.

Synopsis of GCD "Planet Earth" Synopsis of GCD

Svetlana Sergeeva

2017 announced in Russian Federation Year of ecology.

The purpose of this decision is to draw attention to the problematic issues that exist in the environmental sphere and improve the state of the country's environmental security.

In our preparatory group "The Golden Cockerel" "St. Nicholas" d / garden passed the ecological week "Earth - our common home".

We learned to protect nature keep her wealth, behave properly in nature. Children received information about the variety of colors, shapes, objects of nature, learned to feel nature, exchange impressions, emotional experiences.

The children realized that human life depends on the state of the environment. Pure water, fresh air and fertile soil - all this is necessary for people for a full and healthy existence.

At the end of the week we had Exhibition"Earth is our common home". AT drawings the guys reflected different themes: "Let's save the natural world", “Clean air and water are our wealth”, "Earth in danger: ecological disasters".

Here are our works:








I think that's exactly children's looking at the world can become an impetus for adults to finally think seriously about the problems of the environment and change their attitude towards it.

Related publications:

Road and children. Road safety. Increase in road traffic accidents involving children. Adults continue to violate.

"Take care of your planet." Ecological travel game Take care of your planet. The game is a journey Goals and objectives:. - fostering respect for the environment; - to create a desire for conservation.

Take care of your planet! (lesson of a defectologist in a correctional class) Purpose: to form the moral aspect of environmental protection on the basis of education.

Every child today determines the future of a person. The knowledge of true values ​​does not arise in a person by itself: A grain of wheat.

Goals and objectives of the exhibition: 1. Support creative activity children and caregivers; 2. Introducing preschoolers to artistic creativity;.

Regulations on the competition of children's drawings "ABC of security" Regulations on the competition of children's drawings "ABC of safety" 1. General provisions 1.1. Drawing competition among children of MDOU "Kindergarten No.

MUNICIPAL BUDGET PRESCHOOL EDUCATIONAL INSTITUTION "KINDERGARTEN No. 15 "BEREZHOK" Scenario KVN "Take care of your life and health" (for.

, Competition "Presentation for the lesson"

Class: 2

Presentation for the lesson



















Back forward

Attention! The slide preview is for informational purposes only and may not represent the full extent of the presentation. If you are interested in this work, please download the full version.

Target: to acquaint students with the consequences of human impact on nature, environmental problems that need to be addressed in present stage, develop cognitive activity, students' speech, a sense of respect for the world around them; learn to work in groups, pairs.

Tasks:

  • to consolidate with children knowledge about nature, our planet;
  • give an idea that our planet Earth is now in danger: in many places, water, soil, air have become dirty.
  • continue to teach children to distinguish between objects of animate and inanimate nature;
  • to cultivate interest in the environment, curiosity;
  • cultivate respect for nature,

DURING THE CLASSES

Guys, we all have a birthday. And so people agreed and decided that our planet should also have a birthday. That day was April 22. This is the day of birth and protection of our forests, rivers, lakes, animals, birds, insects - this is the day of protection of our nature.
- Guys, let's talk about our planet. What is the name of our planet? What other planets do you know? Let's take a look at the model of our planet together. Our planet is a huge, huge ball. So big that it takes many, many days, even months, to drive around it.
- Why is our planet called the blue ball?
Earth is not only water, but also land. These are huge continents where animals, birds live, where trees and flowers grow, where mountains rise and the heat of the desert breathes: Africa, America, Australia, Europe, Asia, Antarctica.

Questions:

- What is more on the globe - water or land?
Who lives in the seas and oceans? And on dry land?
- And where on the globe do we live?
- What is the name of our city?
- What is the name of our country?

- Guys, all of us - people, animals, birds, plants - are inhabitants of the Earth.
Guys, what do you think, we - people belong to what kind of nature. Prove it. How is it different from animals? Do you think nature can live without man? What about man without nature?

- Now I will tell you about the most important thing - our planet Earth is in danger. It has many sore spots. This happened because many goods are needed to satisfy the needs of people: cars, clothes, etc. People have built many plants, factories, power plants of various types, where steel is poured, iron is smelted, electricity is generated, in a word, they create everything that is so necessary for a happy human life. Air is polluted from these enterprises - it is polluted by smoke that comes out of pipes into the sky, gases from cars. Wastes from factories are poured into rivers and seas and pollute them, oil from tankers spills into the water of the seas and oceans during an accident.
Have you ever wondered what kind of waste is generated the most? Guys, environmental scientists have found that most household waste is generated: various packaging materials made from hard-to-decompose substances, used household appliances, cars, batteries, bottles. Let's remember how long it takes for various materials to decompose.

Paper - from 2 to 10 years.
Tin can - 90 years.
Cigarette filter - 100 years old.
Plastic bag - 200 years.
Glass - 1000 years.

All these items are thrown into nature. This is how our planet Earth is polluted. Animals, plants, people get sick from this pollution.
Today I call on you to help our planet. How can you, the little inhabitants of the Earth, be able to help? We must try to reduce the amount of waste!

  • Resell unwanted items or donate to those in need!
  • Instead of disposable items, try to use more durable ones - glass, ceramic dishes.
  • Repair your things.
  • Reduce paper waste. Use both pages wisely.
  • Always carry a shopping bag with you.
  • Reuse plastic bags.

The use of disposable plastic bags causes irreparable harm to the environment. On average, about 13 billion bags are sold annually. The term of use lasts no more than 30 minutes, and the decomposition time is almost 200 years! The streets of our city are surrounded by garbage dumps, and every day there are more and more of them. This is how our Earth is polluted. Animals, plants, people get sick from this pollution. Nature is dying. Our planet is in danger! She needs help. Do you know the distress signal? I'll tell you - SOS. This is a call for help. The planet needs help, it must be saved by common efforts. How can we help our planet? To help her, one must learn to love nature, to protect it from childhood. Let's make a poster today that will call on all people to treat nature with care, use reusable items, and when going shopping, take a cloth bag. After all, any modern person who is faced with the problem of environmental pollution cannot remain indifferent to this topic. Despite the global nature and difficulty of solving this issue, small but daily efforts will contribute to the fact that the world will become more beautiful and cleaner. This is facilitated by the use of eco bags - products made from natural materials that can replace disposable bags that litter the living space. Fashionable and stylish eco bags will not only fulfill their main function; ecological bag is a reminder to people of the importance of the right attitude to the ecosystem, informs that there are alternative ways of interacting with it that do not have a destructive effect on nature. Using practical and roomy eco bags, you take a step towards a new way of thinking, a new way of life that takes into account the interests of nature, making everyone's life brighter and happier. Any eco bag is made of natural fabric, the use of nylon thread adds strength to it, but is not dangerous for the environment.


close