Environmental issues:
1, resource destruction
Humans consume all kinds of mineral resources excessively. According to the traditional consumption calculation, the world oil can only be used for 50 years, and coal and natural gas can only be mined for 200-300 years.
2. Ecological destruction
Since 1950s, due to the over-exploitation of human beings, more than half of the global forest resources have been lost, and a series of problems, such as desertification and land degradation, have intensified, and nature has been severely damaged, and the function of ecosystem has weakened, which has affected human survival. According to FAO statistics, 2,500 square meters of forests are destroyed every minute on the earth.
3. Land desertification
The desertification land area in the world accounts for 1/3 of the world land area, which is about 48 million km? , is almost the sum of China, Indian, American and Russian territories. The main reason of land desertification is the intensification of soil erosion, such as the area of soil erosion in China is 654.38+0.5 million km? , so that a large number of chemical fertilizers flow away in vain, and the desertification land in China is176,000 km? Every year, 4 million tons of trace elements are lost, resulting in serious losses.
4. Species reduction
There are about130000 species to140000 species in the world. Among them, there are about 6.5438+0.7 million species that have been named by humans, and most of the existing species have not been recorded and described. According to statistics, 75 species are extinct every day and 3 species are extinct every hour in the world. Because of the food chain, every time a plant disappears on the earth, there are often 10 ~ 30 kinds of animals and microorganisms attached to it.
The disappearance of each species reduces the choice of nature and human beings to adapt to the changing environment. The reduction of biodiversity will worsen the living environment of human beings, limit the choice of opportunities for human survival and development, and even seriously threaten human survival and development.
5.sandstorm
According to statistics, there were eight sandstorms in China in the 1960s, three in the 1970s, four in the 1980s and 20 in the 1990s. In the 20th century, the scope of sandstorms became wider and wider, and the losses became heavier and heavier.
6. Soil erosion
Refers to the whole process of soil erosion, migration and precipitation under the action of water flow. In the natural state, the process of surface erosion caused by natural factors is very slow, and it is often in a relatively balanced state with the process of soil formation.
Therefore, the slope can remain intact. This kind of erosion is called natural erosion, also known as geological erosion. Under the influence of human activities, especially after human beings have seriously damaged the vegetation on sloping land, the process of surface soil destruction and land material movement caused by natural factors is accelerated, that is, soil erosion occurs.
7. The living environment has deteriorated
Environmental deterioration is a prominent problem that industrial civilization leads to the unsustainable development of mankind. 1952 London fog and haze incident, 4,000 people died in five days. Others, such as water pollution, acid rain, photochemical pollution, global warming, white garbage and land pollution, are all manifestations of destroying nature.
Extended data
Correctly handle the relationship between environmental protection and development. Environmental protection and economic development are an organic whole. We can't leave development, unilaterally emphasize the protection and improvement of the environment, and we can't blindly pursue development regardless of the bearing capacity of the ecological environment. Especially for the vast number of developing countries, only under the premise of moderate economic growth can we find ways and methods to solve environmental problems that are suitable for our national conditions.
The extensive participation of developing countries is very necessary. In international environmental affairs, there is a tendency to ignore the specific difficulties of developing countries, and their voices have not been fully reflected. Therefore, it is necessary to take measures to ensure that developing countries can fully participate in international environmental activities and cooperation. ?
Full consideration should be given to the special circumstances and needs of developing countries. Developing countries are also facing some more pressing local environmental problems, such as land degradation, desertification, forest decline, soil erosion and other natural ecological deterioration caused by lack of funds, backward technology and population growth, as well as environmental pollution, acid rain and water shortage caused by industrial development.
Baidu Encyclopedia-Environmental Issues
Baidu encyclopedia-environmental deterioration