The first volume of the sixth grade "There is only one earth" text

According to the astronauts who were lucky enough to fly into space, when they roamed in the sky, they looked at the distant earth and saw a crystal-clear sphere with blue and white lines intertwined and covered with a thin layer of water-blue "tulle". The earth, the mother of human beings and the cradle of life, is so beautiful, spectacular and amiable.

However, compared with the vast universe, the earth is small. It is a planet with a radius of only over 6,300 kilometers. In the starry universe, it is like a boat. It's so big, it doesn't grow up.

The natural resources of the earth are also limited. Take mineral resources as an example, it is not given by God, but formed by geological changes over millions or even hundreds of millions of years. The earth is selfless, and it generously provides mineral resources for mankind. However, if mining is not controlled, it will accelerate the depletion of mineral resources on the earth.

The water resources, forest resources, biological resources and atmospheric resources needed by human life could have been regenerated and contributed to human beings for a long time. However, due to the wanton destruction of natural resources and the indiscriminate use of chemicals, human beings are not only unable to regenerate, but also cause a series of ecological disasters, posing a serious threat to human survival.

Some people will say, isn't there a lot of space? There are countless planets there. When the earth's resources are exhausted, can't we move to other planets?

Scientists have proved that there is no second planet suitable for human habitation at least within 40 trillion kilometers centered on the earth. Humans can't expect to move to other planets after destroying the earth.

Yes, scientists have put forward many ideas, for example, building an immigration base on Mars or the moon. However, even if these ideas can be realized, it is still a distant thing. Besides, how many people can live?

"Our earth is lovely and fragile!" This is the sigh of astronauts traveling in space and witnessing the earth.

There is only one earth. If it is destroyed, we have nowhere to go. If all kinds of resources on the earth are exhausted, it will be difficult for us to replenish them from other places. We should seriously protect the earth and its ecological environment. Let the earth better benefit our future generations!

After reading this article, I deeply realized that there is only one earth for human beings to live in the vast universe. The earth dedicates all its resources to unknown people and nurtures the growth and development of mankind. If we destroy her, we have nowhere to go. If all kinds of resources on the earth are exhausted, it will be difficult for us to replenish them from other places. If the non-renewable resources are wantonly destroyed, in the long run, one day the resources will be used up and the earth will perish.

I think the best way is to wake everyone up and take action to protect the earth. We want both "Jinshan Yinshan" and "green mountains and green hills".

I think that as long as all of us have a strong sense of environmental protection, do a good job in environmental protection and truly protect the ecological balance, the earth, the mother of mankind and the cradle of life, will better benefit mankind.

According to the astronauts who were lucky enough to fly into space, when they roamed in the sky, they saw a crystal-clear sphere with blue and white lines intertwined and covered with a thin layer of water-blue "tulle". The earth, the mother of human beings and the cradle of life, is so beautiful, spectacular and amiable. However, the earth is a planet with a radius of only over 6,300 kilometers. It is like a boat in a starry universe.

Compared with the vast universe, the earth is small. It's only this big, and it won't grow any longer. The surface area of the earth is 5. 1 100 million square kilometers, and the land inhabited by human beings only accounts for about one fifth of it. In this way, the range of human activities is very small.

The natural resources of the earth are also limited. Take mineral resources as an example, it is not given by God, but formed by geological changes over millions or even hundreds of millions of years. The earth is selfless, and it generously provides mineral resources for mankind. However, if mining is not controlled, there will be less and less mineral resources on the earth.

The water resources, forest resources, biological resources and atmospheric resources needed by human life could have been regenerated and contributed to human beings for a long time. However, due to the wanton destruction of natural resources and the indiscriminate use of chemicals, human beings are not only unable to regenerate, but also cause a series of ecological disasters, posing a serious threat to human survival.

Some people will say, isn't there a lot of space? There are countless planets there. When the earth's resources are exhausted, can't we move to other planets?

Scientists have proved that there is no second planet suitable for human habitation at least within 40 trillion kilometers centered on the earth. Humans can't expect to move to other planets after destroying the earth.

Yes, scientists have put forward many ideas, for example, building an immigration base on Mars or the moon. However, even if these ideas are realized, it is far away. Besides, how many people can live?

"Our earth is lovely and fragile!" This is the sigh of astronauts traveling in space and witnessing the earth.

There is only one earth. If it is destroyed, we have nowhere to go. If all kinds of resources on the earth are exhausted, it will be difficult for us to replenish them from other places. We should seriously protect the earth and its ecological environment. Let the earth better benefit our future generations!

Interpretation of teaching materials:

This article is a popular exposition, but vivid and easy to read. The text begins with what astronauts see when they look at the earth from a distance in space, and leads to an introduction to the earth. Then, from the small size of the earth in the universe, the narrow range of human activities, the limited natural resources owned by the earth, and the uncontrolled exploitation or random destruction, it shows that the earth is facing the threat of resource depletion. Then it is proved by the research results of scientists that when the earth's resources are exhausted, there will be no second planet for human habitation; Finally, it is concluded that there is only one choice for human beings, and that is to protect the earth and its ecological environment carefully.