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Regarding the understanding of sentences, I think we should work together in Qi Xin to maintain our understanding of this tiny, beautiful and fragile planet.
The planet we live on looks powerful, but it is already very fragile. Protecting the earth is not the responsibility of one or two people. It needs the efforts of each of us to jointly defend our homeland.

There is only one earth, subtitled "Protecting and Maintaining a Small Planet", is a book about global environmental problems. The book was written by British economist B Ward and American microbiologist R Dubos, entrusted by M Strong, Secretary-General of the United Nations Conference on the Human Environment, with the help of the background information provided by 40 countries at the United Nations Conference on the Human Environment held in Stockholm in 1972 and the Communication Advisory Committee composed of 58 countries and 152 experts.

Extended data

"There is only one earth" is a resounding slogan put forward by 1972 at the human environment conference held in Stockholm, Sweden. This article is an expository article, which introduces the relevant knowledge of the earth from the perspective of human existence, clarifies the fact that there is only one earth for human existence, and calls on human beings to cherish resources and protect the earth.

The text has distinct layers and clear context. First of all, the introduction of the earth begins with the scene of astronauts watching the earth in space. Then, from the aspects of the earth's smallness in the universe, its limited natural resources, uncontrolled exploitation or random destruction, it shows that the earth is facing the threat of resource depletion.

Then, with the research results of scientists, it is proved that when the earth's resources are exhausted, human beings cannot move to a second suitable planet; Finally, tell readers that human beings should carefully protect the earth and its ecological environment.