What is the cause of natural high temperature?

1. Dense high-rise buildings cause poor heat dissipation and ventilation, resulting in heat island effect.

2. Deforestation reduces the absorption of carbon dioxide by forests, which leads to the increase of carbon dioxide content in the atmosphere.

Population explosion is one of the main factors leading to global warming in recent years. At the same time, it also seriously threatens the balance between the natural ecological environment. With such a huge population, the annual carbon dioxide emitted by itself will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, thus directly affecting the climate change on the earth's surface.

4. Atmospheric environmental pollution factors. At present, the increasingly serious environmental pollution has become a major global problem, and it is also one of the main factors leading to global warming. Now, the research on global climate change has clearly pointed out that the temperature of the earth's surface has started to rise since the end of last century.

5. Deteriorating factors of marine ecological environment. At present, the change of sea level is on the rise. According to the prediction of relevant experts, the sea level may rise by 50 cm by the middle of the next century. If no measures are taken, it will directly lead to the destruction and pollution of fresh water resources and other adverse consequences. In addition, a large number of toxic chemical wastes and solid wastes produced by land activities are continuously discharged into the sea; Major oil spills in seawater and the destruction of coastal ecological environment by human activities are the main factors leading to the destruction of seawater ecological environment.

6. Land erosion, desertification and other destructive factors

7. Factors of sharp decline of forest resources

Worldwide, due to natural or man-made factors, the forest area is decreasing sharply.

8. Hazard factors of acid rain

The influence of acid rain on ecological environment has attracted more and more attention all over the world. Acid rain will destroy forests, acidify lakes and endanger living things. At present, most of the acid rain in the world is concentrated in Europe and North America, and most of them occur in developed countries and some developing countries. Acid rain is also occurring and developing rapidly.

9. Factors accelerating species extinction

Life on the earth is a precious resource for human beings, and the diversity of life is the basis for human survival and development. But at present, the biological species on the earth are disappearing at an unprecedented rate.

10. Water pollution factors

According to the water quality monitoring project of Global Environmental Monitoring System, about 65,438+00% of the monitored rivers in the world are polluted. Since the beginning of this century, the water consumption of human beings is increasing rapidly, and the scale of water pollution is also expanding, forming a contradiction between supply and demand of fresh water. Therefore, the treatment of water pollution will be very urgent and important.

1 1. Toxic waste pollution factors

More and more toxic chemicals not only pose a serious threat to human survival, but also do harm to the ecological environment on the earth's surface.

12 the change of the earth's period of revolution orbit

The earth's periodic orbit changes from ellipse to circle, which is closer to the sun. According to a scientist's research, the temperature of the earth has been alternating between high temperature and low temperature, with certain regularity.

Edited on 20 13-04-08

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What is the nature of the car? Is it related to high temperature?

On the one hand, there are flammable and explosive materials in the car, on the other hand, the short circuit of the line or the high temperature in the car cause spontaneous combustion! I hope I can help you and I hope you can adopt it. Thank you!

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When will the lighter spontaneously ignite?

Will not spontaneously ignite, even if the temperature is too high, it will only leak or explode, and will not spontaneously ignite. Lighters must not be placed in high temperature. If your buddy has been exposed to high temperature, please don't use it again, because when you press the switch, it will produce sparks and hurt your skin. If you take a lighter and it smells like engine oil, but you are not sure, you can drop a drop of water on the lighter. If it bubbles, it must be leaking. Don't use it again. Don't put a lighter in the car. When the temperature is high in summer and you are not in the car, turn off the air conditioner in the car and don't put the lighter in the car, which may cause an explosion. No matter how high-end lighters are newly bought or cheap disposable lighters, remember not to be too close to your face when lighting and adjusting the flame. After ignition, adjust the flame to a certain size. Lighter selection guide: Oil-cotton lighters: With gasoline as fuel and steel wheels rubbing calcium carbide on fire, this kind of lighters tends to be eliminated. Gas lighter: liquefied butane gas is used as fuel, steel wheel friction calcium carbide is used as ignition source, and the flame size can be adjusted. Its transmission ignition structure has friction type and manual type. Electronic lighter: It uses two piezoelectric ceramics and a resistor to give a certain pressure through the mechanical structure, so that after the two ceramics get an electric shock, they emit sparks to ignite butane gas, which is a relatively advanced lighter. When choosing a lighter, first choose your favorite variety and style. Electroplated casing should be smooth, and no defects such as foaming, peeling and peeling are allowed; Alumina layer shall not be bare, white, seriously stained with water, mandarin duck color and peeling; The initial index fire rate should be above 90%; Gas lighters must not have obvious phenomena such as rushing fire and shrinking fire. Baidu Encyclopedia-Matters needing attention in the use of lighters

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I often work in a high temperature environment of 50 degrees. It's the weather, the natural environment temperature.

In order to make a living, in order to live, Changzhou Jintan and Betray live in a dark room with high temperature of more than 50 degrees for 365 days all the year round.

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What is the cause of natural high temperature? To find the answer, let's ask.

6245 experts answered

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Phenomenon: high temperature in summer and low temperature in winter lead to natural disasters such as floods, droughts and snowstorms. Cause: global warming, environmental damage, especially air. ...

As we all know, in the mid-to-late 1990s, environmental problems characterized by floods and sandstorms became a major constraint on China's economic development and social life, especially in the economically developed eastern region. Through research, people find that the root of environmental problems lies in the continuous deterioration of the ecological environment in the west, and the reason for the deterioration lies in over-exploitation. One of the reasons for over-exploitation is poverty, and the other is underdeveloped science and technology. The people in the west can only benefit from the large-scale primary development of natural mineral resources and energy. They have neither the ability nor the technology nor the consciousness to improve the damaged environmental problems. When floods and sandstorms hit major cities in China from time to time, such as Beijing and Wuhan, the country realized that environmental problems must be solved as soon as possible. The western region cannot solve it by itself, only the central government can solve it. As far as environmental problems are concerned, the western development is indeed a great strategy. The overall strategic goal of the western development proposed by the Central Committee is: "With the efforts of several generations, by the middle of the 20th century, the whole country will basically realize modernization, fundamentally change the relatively backward appearance of the western region, significantly narrow the regional development gap, and strive to build a new western region with economic prosperity, social progress, stable life, national unity, beautiful mountains and rivers and rich people". The word "beautiful mountains and rivers" has been widely used, and the large-scale promotion of the project of "returning farmland to forests and grasslands" has explained this problem to a great extent.

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What are the main natural causes of debris flow?

Natural causes: Weathering of rocks exists in a natural state. In this weathering process, there are not only the decomposition of rocks by oxygen, carbon dioxide and other substances, but also the decomposition of rocks by acidic substances in the air absorbed by precipitation, the decomposition of rocks under the soil by substances secreted by surface vegetation, and the loosening of soil caused by frost freezing and dissolution. These reasons will cause the soil layer to become thicker and looser. Other reasons: 1, unreasonable excavation and construction of railway, highway, canal and other engineering buildings. Some mudslides are caused by the destruction of hillside surfaces in the construction of roads, canals, railways and other construction activities. 2. Abandon soil and slag for quarrying, for example, near Xishui of Ganchuan Highway, 1973 quarrying stones in ditches along the highway in winter,1974 July when a mudslide occurred, blocking 15 bridges and culverts. 3. Deforestation will make the vegetation disappear, the hillside lose protection, the soil is loose, and gullies develop, which will greatly increase soil erosion, and then destroy the stability of the hillside, resulting in adverse geological phenomena such as collapse and landslide, which is easy to cause mudslides. 4. Secondary disasters are floods that occur after heavy rains or flash floods dilute a large area of mountains after earthquake disasters. Extended data:

Some engineering measures to reduce or avoid debris flow mainly include: 1. Crossing project. Refers to the construction of bridges and culverts, crossing from above the debris flow ditch, so that the debris flow can be discharged below it and avoided. This is a common measure taken by railway and highway transportation departments to ensure traffic safety. 2. Adopt this project. Refers to the construction of tunnels, open adits or aqueducts, which pass under the debris flow and let the debris flow be discharged from above. This is another major engineering form for railways and highways to cross debris flow areas. 3. Protection work. It refers to the construction of certain bridges, tunnels, protective buildings for subgrade and river courses in debris flow areas or other major engineering measures in mountainous areas, so as to resist or eliminate the erosion, impact, side erosion, siltation and other hazards of debris flow to the main buildings. Protection works mainly include: slope protection, retaining wall, dam and groin, etc. Baidu encyclopedia-debris flow

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