Make up four words with the following words, and then choose one to write one or two sentences. Resettlement of exhausted mining of mineral disaster resources in ecological base.

Population, resources, environment and economic and social development are four major issues that people all over the world are increasingly concerned about. Among them, environmental problems are serious problems that restrict economic development and affect human life. Environmental problems mainly refer to the environmental damage and pollution caused by human production and life. Its essence is the contradiction between economic development and environmental protection, and the imbalance between man and nature. At present, the ecological and environmental problems facing the world mainly include:

greenhouse effect

Greenhouse effect refers to the phenomenon that carbon dioxide, nitrous oxide, methane and fluoride are discharged into the atmosphere in large quantities, which makes the global temperature rise. At present, the global annual emission of carbon dioxide into the atmosphere is about 23 billion tons. It has increased by 20% compared with the beginning of the 20th century. It's still 0. The speed of 5% is increasing, which will inevitably lead to global warming, ecosystem destruction and sea level rise. According to statistics, it is estimated that the global sea level will rise by about 20cm by 2030 and 65cm by the end of this century, which seriously threatens low-lying islands and coastal areas.

Ozone depletion

The ozone layer is a gas layer with high ozone concentration in the upper atmosphere, which can prevent excessive solar ultraviolet rays from irradiating the earth's surface and effectively protect the normal growth of all living things on the ground. The destruction of the ozone layer is mainly achieved through the chain reaction that Freon, a chemical widely used in modern life, enters the stratosphere and decomposes into atomic chlorine under the action of ultraviolet rays. According to statistical analysis, ozone concentration decreased by 65438 0%, skin cancer increased by 4%, and the incidence of cataract increased by 0. 6%。 By the beginning of this century, the ozone layer over the middle of the earth had decreased by 5%- 10%, which increased the number of skin cancer patients by 26%.

Land degradation and desertification

Land degradation and desertification refers to the process of land quality degradation and gradual desertification due to the interaction of human factors such as grazing, farming and deforestation and a series of natural factors. 15% of the global land area has been degraded to varying degrees due to human activities. Due to land degradation and desertification, the number of hungry refugees in the world has dropped from 4. 600 million increased to 5. 500 million

Pollution and transfer of waste

The pollution and transfer of waste refers to the waste gas, waste liquid and solid waste discharged into nature or other countries by industrial production and residents' life, which seriously pollutes the air, the land environment of rivers, lakes and seas and harms human health. According to the research, a 1 battery can pollute 60 liters of water, making ten square meters of land lose its use value, and its pollution can last for 20 years. Acid rain, the contemporary "death in the air", has been recognized for its influence and erosion on forest soil, lakes and various buildings. The transfer of hazardous waste often becomes a political event of international exchange.

Reduction of forest area

Forest is known as "the lung of the earth" and "the general dispatching room of nature", which has a great regulating effect on the environment. Due to a large number of imports from developed countries and land reclamation, logging and grazing in developing countries, the forest area has been greatly reduced. Forest reduction leads to soil erosion, frequent floods, global warming and species extinction.

Reduction in biodiversity

The reduction of biodiversity refers to all biological species, including animals, plants and microorganisms, which are constantly disappearing due to the loss of ecological environment, over-exploitation of resources, environmental pollution and the introduction of exotic species. It is estimated that there are about 30 million species on the earth. 724 species have become extinct since 1600. At present, 3,956 species are endangered, 3,647 endangered and 7,240 rare. Most experts believe that14 of the living things on the earth may face the danger of extinction in the next 20-30 years. In 1990-2020, 5%- 15% of the species in the world may be extinct, that is, there will be 40- 140 species every day. The existence of biodiversity plays an irreplaceable role in the evolution and protection of biosphere life support system.

Exhaustion of water resources

Water is the source of life. Water seems to be everywhere. However, the shortage of drinking water threatens the survival of mankind. At present, the global annual water consumption has reached 7 trillion cubic meters. In addition, the discharge of industrial wastewater, the abuse of chemical fertilizers, the random dumping of garbage and the sharp increase of domestic sewage have turned rivers into sewers and lakes into sewage fields. Deforestation caused a lot of water evaporation and loss, and drinking water decreased sharply. Many scientists predict that water will become the scarcest resource for human beings in 2 1 century.

nuclear pollution

Nuclear pollution refers to radioactive pollution caused by nuclear leakage or even nuclear explosion due to various reasons. It has a wide range of hazards, extremely serious damage to surrounding organisms, long duration and complex post-treatment risks. For example,1April 1986, a nuclear accident occurred at the Chernobyl nuclear power plant in the former Soviet Union, and130,000 people were evacuated, resulting in economic losses of1500 million dollars.

marine pollution

The ocean is known as "the frontier of national defense, the channel of trade, the treasure house of resources, the hometown of sex and rain, and the cradle of life". However, she is being seriously polluted. Common marine pollution mainly includes crude oil pollution, floating object pollution, organic pollution and the red tide and Kuroshio caused by it. Marine pollution directly leads to the deterioration of marine environment and the decrease of biological species.

noise pollution

High-intensity noise produced by industrial machinery, construction machinery, automobiles, airplanes, etc. has caused great damage to human living environment and seriously affected human health.

The population explosion has overwhelmed the earth; Environmental pollution makes it scarred; Ecological imbalance made her lose her former glory; Species extinction endangers the whole biosphere. Facing the endless pollution, the river is crying, the spring is moaning and the sea is roaring. Forests disappear, streams sing, grasslands degenerate and dust flies. Our earth is overloaded; Our home is going to decline, and the alarm of human beings is sounded by themselves, so it is urgent to save nature, ecology, environment and the earth! Otherwise, the end of mankind will be a cup of poisoned wine!