We will find that the rice fields in rural areas are crystal clear, and there are many small fish and shrimps in them, all of which are wild. But now there are very few, almost invisible, only garbage floating on the river and smelly ponds. I think there are three main reasons for this contrast.
First of all, the environmental pollution is serious, and wild fish and shrimp are difficult to survive. Now the environmental pollution is getting more and more serious. We saw many plastic bags and mineral water bottles on the paddy field, and no one cleaned them. Not only that, but there will also be sewage discharged from some factories. The water is no longer clear, and it becomes dark green, dark green and stinks. There are also a lot of pesticides and fertilizers, which also lead to serious river pollution.
Secondly, many ponds and rivers have dried up. Now many rivers have dried up, leaving only sand. As there are fewer and fewer people in rural areas, many ponds and rivers are lack of management. Some local people will exploit and destroy rivers at will for the benefit, which will lead to the gradual depletion and siltation of rivers, and the wild fish and shrimp in rivers will gradually lose the protection of their living environment and disappear.
In addition, people have lost wild fish and shrimp because of greedy overfishing. In the past, people either caught fish without restraint or did not use some extreme means to fish. Nowadays, people catch a lot of wild fish and shrimp in the river for profit, and the profit is also great. Therefore, this has a great impact on the diversity of fish, leading to the slow survival and sustainable development of small fish and shrimp in the river.
These are the reasons why wild fish and shrimp can't be found in rural paddy fields now.