Two inexplicable fish

One day, a small fish and an old fish walked in the river. Suddenly, the old fish asked about the water quality in the small fish river? Xiaoyu said: I don't know if the water is clear or turbid. Let me talk about whether this river is clear or muddy when you were a child. The old fish said: When I was a child, I lived here, when the river was crystal clear, the fish and shrimps were in groups, chasing each other, the water on the shore was green, and there were many children playing on the shore. ,play. At that time, the industry was underdeveloped, there were not many factories, and there were no factories discharging sewage into the river. Nowadays, the industry is more and more developed, factories are everywhere, and a large amount of sewage is discharged into the river, resulting in poor water quality, fish and shrimp are dying one after another, and the water plants on the shore are slowly dying. There are no children anymore. I came here to swim, because they saw that the river was too dirty, and they smelled bad, and there was rubbish floating everywhere on the water, so they didn't dare to come again. We have not been able to live here, so we have to move to a river that is not polluted. Children, you have to remember that human beings are causing everything now. Then you just didn't know why the river was clear or muddy? Xiaoyu said: Because the country has not released a water quality report!

Through this pair of old and young fish, I know that human beings have destroyed the natural environment, and have not realized it yet. And know, don't correct it in time, let us join hands to protect the biodiversity!

Hualian Foreign Language Experimental School, Baiyun District, Guangzhou, Guangdong Province, China: Duling Island - ALONG