Appreciation of environmental protection calligraphy works
Selected pictures of environmental protection calligraphy works 1
Selected pictures of environmental protection calligraphy works 2
Selected pictures of environmental protection calligraphy works 3
Selected pictures of environmental protection calligraphy works 4
Environmental protection knowledge, environmental pollution knowledge
Due to people's insufficient expectation of the negative impact of highly developed industries and unfavorable prevention, three global crises have resulted: resource shortage, environmental pollution and ecological destruction. Humans constantly discharge pollutants into the environment. However, due to the diffusion, dilution, redox and biodegradation of atmosphere, water and soil, etc. The concentration and toxicity of pollutants will naturally decrease, which is called environmental self-purification. If the discharged substances exceed the self-purification capacity of the environment, the environmental quality will change adversely, endangering human health and survival, thus leading to environmental pollution.
There are many classifications of environmental pollution:
According to environmental factors: air pollution, water pollution and soil pollution.
According to human activities: industrial environmental pollution, urban environmental pollution, agricultural environmental pollution.
According to the nature and sources of environmental pollution: chemical pollution, biological pollution, physical contamination (noise pollution, radioactivity, electromagnetic wave) solid waste pollution and energy pollution.
Environmental pollution will cause direct damage and influence to the ecosystem, such as desertification and forest destruction, and will also cause indirect harm to the ecosystem and human society. Sometimes this indirect environmental impact is more harmful than the direct harm caused at that time, and it is more difficult to eliminate. For example, the greenhouse effect, acid rain and ozone layer destruction are all environmental impacts caused by air pollution. This kind of environmental effect from environmental pollution is lagging behind, and it is often difficult to be detected or predicted when pollution occurs. However, once it happens, it means that environmental pollution has developed to a very serious degree. Of course, the most direct and easily felt consequence of environmental pollution is to reduce the environmental quality of human beings and affect their quality of life, physical health and production activities. For example, urban air pollution causes air pollution, and the incidence of people is rising. Water pollution worsens the quality of water environment, and the quality of drinking water sources generally declines, threatening people's health and causing premature birth or malformation of fetus. Serious pollution incidents not only bring health problems, but also cause social problems. With the intensification of pollution and the improvement of people's awareness of environmental protection, disputes and conflicts between people caused by pollution have increased year by year.
At present, environmental pollution problems have appeared in different degrees all over the world, including atmospheric environmental pollution, marine pollution and urban environmental problems. With the globalization of economy and trade, environmental pollution is becoming more and more international. In recent years, the problem of transboundary movement of hazardous wastes is a prominent manifestation in this regard.