3 environmental problems of the desert are still simple

1 Air pollution problem

As a developing country, China's energy structure is mainly dominated by coal for a long time, while natural gas, oil, and renewable energy account for a relatively small proportion, which directly leads to a very serious problem of air pollution in China.

With the continuous development of social economy, industrial production and automobile exhaust have caused air pollution to the environment, especially in the northern region.

2. Water environment pollution

With the continuous development of China's socialist market economy, the demand for various resources and energy has also increased, and the development of water resources has further aggravated the problem of water pollution.

There are 36 urban river sections in the country with poor water quality of Class 5 and have lost their use function.

The water quality of large freshwater lakes (reservoirs) and urban lakes is generally poor, and the eutrophication of more than 75 lakes is aggravated, mainly caused by nitrogen and phosphorus pollution.

3 Garbage disposal issues

In recent years, with the rapid development of the food delivery industry, online ordering has become more and more popular.

However, the problems are becoming more and more prominent, and the "white pollution" caused by countless plastic lunch boxes, disposable chopsticks, plastic bags and other takeaway garbage has risen again, and the phenomenon of takeaway garbage besieging the city is serious.

4 Land desertification and sand hazards

At present, China's desertified land has accounted for 27 3 of the total land area of the country, and the desertification area is still growing at a rate of 2460 square kilometers per year.

The annual number of severe sandstorms in China has increased from 5 in the 50s of the 20th century to 23 in the 90s.

Desertification has led to the forced relocation of residents in some parts of Inner Mongolia.

5 Soil erosion

China is one of the countries with the most serious soil erosion in the world, and the area of soil erosion is extensive and large.

According to the results of the first national water conservancy census, China's existing soil erosion area is 10,000 square kilometers.

Serious soil erosion is a concentrated reflection of China's ecological deterioration, which threatens national ecological security, drinking water safety, flood control safety and food security, restricts the economic and social development of hilly areas, and affects the process of building a well-off society in an all-round way.

6 Drought and flooding

The harm of floods: not only destroys material property and causes chaos in social order, but also directly or indirectly endangers life and causes great harm to people's souls.

The harm of drought: It is the first disaster that endangers agricultural and animal husbandry production, promotes the further deterioration of the ecological environment, and causes other natural disasters to occur due to climate warming and drying.

Top 10 global environmental issues.

1. Climate warming 2, ozone layer depletion 3, biodiversity loss 4, acid rain spread 5, and forest decline sharply.

6. Land desertification 7, air pollution 8, water pollution 9, marine pollution 10, solid waste pollution

Environmental problems generally refer to the phenomenon of environmental quality decline or ecological imbalance caused by nature or human activities acting on the environment around people, and such changes in turn have an adverse impact on human production and life.

In the process of transforming the natural environment and creating a social environment, the natural environment is still changing according to its inherent natural laws. On the one hand, the social environment is conditioned by the natural environment, and it also moves according to its inherent laws. Human beings and the environment are constantly influencing and interacting with each other, resulting in environmental problems.

Environmental problems can be divided into two categories: one is caused by damage and pollution caused by natural factors. Such as:

Volcanic activity, natural disasters such as storms, tsunamis, etc., endemic diseases caused by the uneven distribution of elements in the environment, and radiation sickness caused by radioactive substances in nature. The other category is environmental pollution caused by human factors and the destruction of natural resources and ecological environment.

Various pollutants (or pollution factors) generated in human production and living activities enter the environment, exceeding the allowable limit of environmental capacity, causing the environment to be polluted and damaged; When human beings develop and utilize natural resources, they exceed the carrying capacity of the environment itself, which deteriorates the quality of the ecological environment, and sometimes the phenomenon of depletion of natural resources occurs, which can be attributed to environmental problems caused by man-made.

Fundamentally speaking, environmental problems are a by-product of economic and social development. Specifically, it can be summarized as follows:

1) enormous pressure on the environment due to population growth;

2) Environmental pollution caused by human production and living activities;

3) adverse changes in the ecological damage caused by human development and construction activities;

4) The destruction of human relics, scenic spots, nature reserves, the extinction of rare species, and the destruction and pollution of the natural and social environment such as the ocean due to human social activities, such as military activities and tourism activities.

"Wow-Wow......"The taps keep coming out of the clear tap water, and the water people don't know where to go; With the lights and TV on, the room was empty for a long time; The notebook was thrown into the trash, but only a few pages were used; Forests and oases continue to disappear, but people ignore ......

Do you say, "Are the natural resources of the earth unlimited?" If we use resources unsparingly, won't the earth dry up?

The Yellow River has been cut off, Lop Nur has dried up, some major rivers have been polluted, and forests have been deforested indiscriminately, ......All these undesirable phenomena are caused by the "second planet" in our human minds, and scientists have proven that there is no second planet suitable for human habitation at least within the 400,000 kilometers of the center of the earth. However, we destroy nature at will, recklessly misuse chemicals, and make it impossible to regenerate water, forest, and biological resources that can be regenerated and contribute to human beings, and we hope that we will move to other planets after destroying the earth again. Have you forgotten how many pairs of greedy eyes are staring at ......us at the same time as the earth is declining?Sandstorms, due to people cutting down trees indiscriminately and not paying attention to oases, resulting in the reduction of vegetation area and serious erosion of water and soil; Acid rain, non-reforestation, soil erosion are causing it to corrode our smiles and beautiful ......Every inch of the soil is green, and it is being swallowed up by people's wantonness.

What are the global ecological and environmental problems that we need to pay attention to?

1. Exhaust gas pollution. Exhaust gas emissions continue unabated. For example, there are more and more wealthy people, and so do the number of vehicles, especially private cars. Exhaust gases emitted by chemical plants, petrochemical companies

2.Greenhouse effect. The cause of the ozone layer is getting thinner and thinner, and the air is polluted. Example: In New Zealand, you can see glaciers drifting in Antarctica. The fact that the Antarctic is melting is the best proof of this

3.Lack of resources. The simplest truth is that non-renewable resources are limited, and will there be anything when they are used up? For example, some companies are now buying sorghum from our mill for fuel

However, I think if there is a change, China is the most ashamed one, the United States is importing Chinese oil every year, and its own oil is not extracted; Japan does not allow the use of home-made chopsticks

1. Species extinction, 2. Resource shortage, 3. Energy shortage, 4. Greenhouse effect, 5. Emissions of three wastes (gas, water, and substances). 6. Air, land and food pollution. 7. Nuclear competition, radioactive contamination, 8. Abnormal climate and frequent disasters.

1.Warming 2Ozone Layer Depletion 3

Biodiversity reduction 4Acid rain spread 5Forests plummeted by 6

Desertification of land 7Air pollution 8Water Pollution 9

Marine pollution 10Solid waste pollution.

The state of the environment in our country:

1.Air pollution is soot-type pollution, with dust and acid rain being the most harmful, and the degree of pollution is intensifying.

2.Acid rain is mainly distributed in the south of the Yangtze River, the east of the Qinghai-Tibet Plateau and the Sichuan Basin. Acid rain is the most polluted region in central China.

3.The waters of rivers, lakes and reservoirs are generally polluted to varying degrees, and the pollution of waters near industrially developed cities and towns is particularly prominent.

4.Among the seven major river systems, the Yellow River Basin, the Songhua River and the Liaohe River Basin are seriously polluted.

5.Total phosphorus and total nitrogen pollution in large freshwater lakes are widespread, and eutrophication is serious.

6.The Bohai Sea and the East China Sea are more polluted in the four major sea areas, while the South China Sea is lighter.

7.The deterioration of the ecological environment of fishery waters has not fundamentally changed, and is showing an aggravating trend.

8.Urban surface water pollution is generally serious and shows a worsening trend.

9.2 3 of the country's rivers and more than 10 million hectares of farmland are polluted.

Today's world is facing 10 major environmental problems:

1) Global warming. Greenhouse gases such as carbon dioxide and methane prevent heat from the Earth's surface from escaping, and a warming climate causes glaciers at the poles to melt, causing sea levels to rise and flooding coastal areas.

2) The ozone layer is destroyed. The ozone layer absorbs the sun's ultraviolet rays. Ozone-depleting substances emitted from human industrial and living activities can destroy the ozone layer, leading to an increased incidence of cancer and cataract in humans.

3) Biodiversity reduction. The main reasons are overhunting, industrial pollution, etc. The decline in biodiversity will gradually disintegrate the foundations of human existence.

4) Acid rain spreads. A large amount of sulfur dioxide and nitrogen oxides are discharged into the atmosphere and dissolved in water during rainfall, that is, acid rain is formed. Acid rain is corrosive and can damage crops, cause lakes to acidify, and fish to die.

5) Sharp loss of forests. Over-harvesting by humans, combined with forest fires, has led to a sharp decline in forest area. Deforestation leads to soil erosion and frequent flooding.

6) Desertification of land. Human activities such as overgrazing, mining, and road construction have degraded grasslands. At present, the global area of desertified land is almost equal to the land area of Russia, Canada, the United States and China combined.

7) Shortage of resources. The most serious of these is the shortage of water, arable land and mineral resources. About 1 2 people worldwide are currently threatened by water scarcity. Industrial and urban construction projects are constantly occupying arable land, which makes human beings face the dilemma of insufficient arable land.

8) The water environment is seriously polluted. Industrial sewage makes the otherwise clear water body black and smelly, and bacteria breed. In China, less than 30% of the water sources of the seven major water systems can meet the water quality standards of drinking water sources.

9) Air pollution. Suspended particles are inhaled by the human body and can easily cause respiratory diseases. The second-level air standard is suitable for human life, but only 1 3 cities in China can meet the second-level air standard for the vast majority of days in a year.

10) Solid waste disaster. Solid waste includes municipal waste and industrial solid waste. Garbage contains harmful substances, and random stacking can pollute the surrounding air, water bodies, and even groundwater.

The economic losses caused by environmental pollution to China are as high as 68 billion yuan per year, which is equivalent to the losses caused by the eight Tangshan Congresses. Today, humans are emitting 23 billion tonnes of carbon dioxide into the atmosphere every year, a 25% increase since the beginning of the 20th century. The large increase of pollutants such as carbon monoxide and sulfur dioxide in the atmosphere not only endangers human health and affects the normal growth of animals and plants, but also causes the temperature in our body to rise.

The large amount of exhaust gas has also seriously damaged the ozone layer, which is as large as the territory of the United States and as high as Mount Everest. Due to the lack of protection from the ozone layer, the amount of ultraviolet rays reaching the ground has increased significantly, and the number of cancer and disease patients has increased significantly.

Beginning in March 2000, over a period of more than 40 days, sandstorms hit Beijing, the capital of China, seven times, with winds reaching a maximum force of 8. On March 24, the wind and sand hit Nanjing, Suzhou, Yangzhou and other eight cities crossed the whole territory of Jiangsu and went straight to Shanghai, and on the 28th, Shanghai fell a "mud rain". The wind and sand obscured the sky and the sun, and houses collapsed and trees were broken, killing dozens of people.

In the 21st century, the Earth's forest cover will be several times less than in the 20th century, with a decrease in forest cover and an increase in human carbon dioxide emissions to the planet. When carbon dioxide gas doubles, the Earth's temperature will rise. By 2050, the resulting greenhouse effect will increase global mean sea level by 20 cm.

By 2100 it will rise 65cm; The destruction of the ozone layer increases the chance of direct exposure to ultraviolet rays, which can cause macular degeneration in the fundus, and if ozone continues to decrease by 6%, the number of people blind due to cataracts will increase by 166,175 million per year. If this development continues, it will be difficult for human beings to adapt to the earth's environment in the 21st century.