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In general, environmental pollution can be the result of human activities, natural activities, or a combination of both. For example, volcanic eruptions emit a large amount of dust and sulfur dioxide and other harmful gases into the atmosphere, which also causes pollution of the atmospheric environment. But usually, environmental pollution is more caused by human activities, especially socio-economic activities.
We usually refer to this kind of environmental pollution that originates from human activities. The reason why human activities cause environmental pollution is that there is a fundamental difference between human beings and other living things: in addition to their own production, human beings also produce materials on a larger scale, which is not found in all other living things.
Due to this, the intensity of human activity is much greater than that of other living beings. For example, other organisms only take the amount of water they need to survive in an ecosystem, while humans use water many times more than other organisms, so much so that in some local ecosystems, all the water is insufficient. The source of the emission of a pollutant is called the source of pollution.
The various sources of pollution will be described in section IV. Environmental pollution can be classified from different angles. According to the type of polluted environmental system or the dominant elements in it, it can be divided into air pollution, water pollution, soil pollution and so on; According to the social field where the pollution source is located, it can be divided into industrial pollution, agricultural pollution, traffic pollution, etc.; According to the form or nature of pollutants, they can be divided into exhaust gas pollution, wastewater pollution, solid waste pollution, noise pollution, radiation pollution, etc.
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Severe soil erosion;
Desertification is expanding rapidly;
increased grassland degradation;
forest resources are declining sharply;
accelerated extinction of biological species;
declining groundwater levels;
increased pollution of water bodies;
Serious air pollution;
The amount of solid waste stored is too large, and the garbage surrounds the city;
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Natural and man-made factors.
Environmental changes are related to natural factors and human factors, the movement of volcanoes and plates caused by the movement of the earth's crust has led to the change of land and sea, human indiscriminate logging, desertification, and destruction of the living environment of species.
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Environmental changes are related to many factors, such as changes in the natural environment, changes in the weather, and changes in the climate. Man-made garbage can affect the environment.
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For a long time, insufficient investment in ecological environmental protection and construction is also an important reason for the deterioration of the ecological environment, and there is also a belief that the environment is damaged.
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The most important cause of environmental degradation is people, all activities generated by people may have an impact on the environment, such as our industry, our agriculture, our travel, as well as our excavation of natural resources and the burning of the wild base, all of which may produce some things that deteriorate the environment, including our air, water pollution, and the rapid change of the entire climate, which are related to human activities.
Therefore, we must first be ourselves and not do things that damage the environment.
2. The artificial introduction of alien species changes the original ecological chain. 3. Chemical pollution, nuclear pollution and other comprehensive damage to the ecological chain.
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1. Cultivated land resources continue to decrease, grassland resources continue to degrade and decrease, the contradiction between supply and demand of forest resources is still very prominent, water resources continue to be tight, and the rate of species extinction is accelerating;
2. The total amount of pollutants discharged from potatoes is still quite large, which is much higher than the environmental self-loss and positive net capacity;
3. The task of industrial pollution control is still quite arduous, and some places that have been treated have been repeated, and the proportion of urban life pollution has increased significantly;
4. Agricultural water quality and soil pollution in many areas are becoming more and more prominent, and the harmful residues of agricultural products in some places are seriously exceeded, affecting human health and product exports;
5. Soil erosion and desertification are still intensifying in some areas.
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