Talk about the current environmental situation and how to protect my earth in combination with the actual life.

As we all know, the main manifestations of environmental crisis are environmental pollution and ecological destruction. The so-called environmental pollution refers to the discharge of substances or energy beyond the self-purification ability of the environment into the environment due to human activities, which leads to the environment being harmful to human survival and development. It usually includes air pollution, land water pollution, marine pollution, noise pollution, solid waste pollution, radioactive pollution, toxic chemical pollution and so on. The so-called environmental damage refers to the improper development and utilization of the environment by human beings, resulting in the destruction or reduction of environmental efficiency, thus endangering human survival and development. It usually includes the destruction of land resources, forest resources, grassland resources, water resources, mineral resources, species resources, natural landscapes, scenic spots and cultural relics.

With the rapid development of science and technology in today's world, the contradiction between the existing life style of human beings and the life support capacity of the earth is increasingly intensified, and the environmental crisis has the following characteristics:

(A) the globalization of environmental crisis

Generally speaking, in the past, the scope of environmental crisis, the objects of harm or the consequences were mainly concentrated in the vicinity of pollution sources or specific ecological environment, which showed local and regional characteristics and had little impact on the global environment. However, the current environmental crisis transcends national boundaries and is characterized by globalization: for example, greenhouse effect, ozone layer destruction, acid rain and so on. This is the world's most concerned, not only concentrated on the land surface and the low-level atmospheric space where human beings live, but also involving high altitude and ocean. For another example, a country's air pollution, especially the excessive emission of sulfur dioxide, may lead to acid rain hazards in neighboring countries or regions. For another example, global warming, melting polar glaciers and rising sea levels will cause devastating disasters to almost all countries and regions, especially coastal countries and regions.

(B) the integration of environmental crisis

As we all know, until 1950s and 1960s, people were most concerned about environmental crisis or "three wastes" pollution and its harm to health. However, the current environmental crisis has gone far beyond this category, involving all aspects of human living environment, including the sharp decline of forests, grassland degradation, desert expansion, soil erosion, urban congestion and many other fields, thus showing comprehensive characteristics.

(C) High-tech environmental crisis

As we all know, the test of atomic bombs and missiles, the use of nuclear reactors and their accidents, and electromagnetic radiation will have a serious impact on the environment. For example,1Before April 26th, 986, the No.4 reactor of the Chernobyl nuclear power plant in the former Soviet Union exploded, causing 3 1 person to die on the spot, 273 people were injured by radiation, and130,000 residents were evacuated. According to Ukraine's estimation, the intensity of this disaster is equivalent to 500 times that of Hiroshima atomic bomb. The radioactive dust produced by the accident drifted with the wind, which caused many countries in Europe to suffer greatly. The estimated number of victims is not less than 300,000. Follow-up survey shows that in the following ten years, more than 5000 people died of radiation sickness, of which 60% were victims who committed suicide because they could not bear the pain of radiation. In addition, more than 30,000 people are permanently disabled. It can be seen that the high-tech characteristics of the current environmental crisis are really shocking!

(D) the limits of environmental crisis

Some scientists believe that the current living environment of human beings has reached the limit that the earth can support life. Its performance is the aggravation of environmental pollution, including not only the pollution of various harmful chemicals to the atmosphere, water, soil and plants and their effects on human health, but also some substances that are not directly toxic, such as CFC and carbon dioxide, but their existence will cause serious global environmental crises such as greenhouse effect and ozone layer destruction to the global climate and environment. It is also manifested in the destruction of renewable resources, including the destruction of biological (forest, biological species) and non-biological resources (land, water), the excessive use of non-renewable resources, and the loss of various fossil fuels and minerals; It is also manifested in other environmental crises that have not been discovered by human beings. In view of this, Professor Godland particularly emphasized: "At present, the primary net output of photosynthesis directly or indirectly utilized by human economy has reached 40%. This is already a dangerous level "; Among the land degradation areas caused by various reasons in the world, the land degradation area of human agricultural land (including desertification, erosion and salinization) has reached 35%. In fact, the current environmental crisis, from different levels and through different channels, promotes each other and forms a joint force, which promotes environmental deterioration and pushes human beings to the edge of environmental carrying capacity, thus making the current environmental crisis show limited characteristics.

At present, environmental protection mainly includes the following main contents:

(1) Prevent environmental pollution caused by production and living activities, including the prevention and control of "three wastes" (waste water, waste gas and waste residue), dust, radioactive substances, noise, vibration, odor and electromagnetic microwave radiation, harmful gases, liquids and noise generated by transportation activities, pollutants discharged by ships at sea, toxic and harmful chemicals used in industrial and agricultural production and people's life, and smoke and dust discharged from urban life. (2) Preventing environmental damage caused by construction and development activities, including preventing environmental pollution and damage caused by large-scale water conservancy projects, highway trunk lines, large-scale ports and docks, airports and large-scale industrial projects, and environmental damage and pollution caused by land reclamation and lake reclamation activities, developing offshore oil fields, coastal zones and marshes, developing forests and mineral resources, and establishing and building new industrial zones and new towns. (3) Protecting the natural environment with special value, including effectively protecting rare species and their living environment, historical sites of special natural development, geological phenomena, landforms and landscapes, etc. In addition, urban and rural planning, controlling soil erosion and desertification, planting trees, controlling population growth and distribution, and rationally allocating productive forces also belong to environmental protection. Environmental protection has become one of the common actions and main tasks of governments and people all over the world. China declared environmental protection as a basic national policy, and formulated and promulgated a series of environmental protection laws and regulations to ensure the implementation of this basic national policy. (4) Environmental pollution problems have appeared in different degrees all over the world, including atmospheric 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.