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Seventh grade history composition
I am also in Grade One of No.8 Middle School. I just finished writing it. Please refer to.

Water is the source of life. Man's demand for water is second only to oxygen. If people don't take certain vitamins or minerals, they may live with diseases for weeks or years, but if there is no water, they can only live for a few days. This shows the importance of water to human survival. The important component of human cells is water, which accounts for 60~70% of adult body weight. People need water for all kinds of physiological activities, and water has a certain regulating effect on body temperature.

To sum up Jinzhou's water resources in one sentence is: serious pollution. The water quality of Daling River above Yixian County is good. But it began to deteriorate in the power plant, and it was even worse in Jincheng. The water quality of Xiaoling River above No.6 oil plant is also good. No.6 oil plant began to be dirty after that, and it smelled of oil. In Dongbo District, there is a huge sewage outlet, and a large amount of urban sewage is discharged into Xiaoling Hanoi, making the river more polluted. The water quality of Nverhe River is OK to the naked eye, but the test results are not optimistic, especially after passing through the ferroalloy factory. The water quality of Cooper River above Jintun is not bad. After Jintun, a lot of domestic sewage and aquaculture sewage were discharged, which made the river become stagnant water. It is already seriously short of water, and some of it has been polluted. How much is left?

The water crisis has become a bottleneck affecting the development of China's national economy and will threaten the soaring of the Chinese nation. In order to save our common home, for our own survival and development, and in the face of the increasingly severe water crisis, we should start from the small things around us, turn off the tap at hand, save every drop of water and do our bit for our home.