What are the causes of climate warming?

Question 1: What are the man-made causes of global warming?

1. Population explosion

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

2. atmospheric environmental pollution factors

the increasingly serious environmental pollution has constituted a major global problem and is also one of the main factors leading to global warming. In the 21st century, 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.

3. Factors of marine ecological environment deterioration

The change of sea level is on the rise. According to the prediction of relevant experts, the sea level may rise by 5cm by the middle of the next century. If measures are not 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 in land activities are continuously discharged into the sea; Major oil spill events in seawater and the destruction of coastal ecological environment caused by human activities are the main factors that lead to the destruction of seawater ecological environment.

4. Factors of sharp decline of forest resources

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

natural factors

1. Volcanic activity

2. Changes of the earth's periodic 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, which has certain regularity.

3. iceberg melting

scientists have found that if the global temperature continues to rise, the melting of arctic icebergs will release a large number of toxic chemicals trapped in ice and cold water. Researchers warn that these large amounts of poisons gathered in the polar regions are unknown, and their release will seriously endanger marine life and human living environment. These chemicals that will seep out include pesticides DDT and chlordane. All these are persistent organic pollutants, which may lead to cancer and birth defects, and were previously captured by the Arctic ice and frozen water. However, scientists in Norway and Canada found that global warming is making these pollutants "reborn" when monitoring the measurement results of organic pollutants in the air in 1993 and 29.

4. Solar activity

Some experts believe that the current climate warming is related to the solar cycle and has little to do with human activities. Russian scientists believe that the warming cycle of Mars is consistent with that of the earth, and the main reason is the sun; Some scientists in the United States also believe that the main cause of climate change is the sun. From 1975 to 2, the curve of solar magnetic cycle and surface temperature change in the northern hemisphere was almost the same. In addition, Danish astronomers believe that the main cause of climate change is the universe. But more people think that human activities are the main cause of climate warming. However, Japanese and Danish researchers recently pointed out that the increase of greenhouse gases is not the only cause of climate warming, and the change of solar activity has also played a role in promoting it.

Question 2: What are the main causes of global warming? There are many reasons for global warming, which can be summarized as follows:

1. Population explosion

Population explosion is one of the main factors leading to global warming. At the same time, it also seriously threatens the balance between natural and ecological environments. With such a large population, the carbon dioxide emitted by itself every year will be an amazing number. As a result, the content of carbon dioxide in the atmosphere will be directly increased, and the carbon dioxide "greenhouse effect" formed in this way will directly affect the climate change on the earth's surface. Because of the warm climate, the Moscow warm winter brown bear can't hibernate

2. Atmospheric environmental pollution factors < P > The increasingly serious environmental pollution has become a major global problem and 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.

3. The deterioration factors of marine ecological environment < P > The change of sea level is constantly on the rise. According to the prediction of relevant experts, the sea level may rise by 5cm by the middle of next century. If measures are not taken, it will directly lead to the destruction and pollution of fresh water resources. In addition, a large number of toxic chemical wastes and solid wastes are constantly produced in land activities. Major oil spill events in seawater and the destruction of the ecological environment in coastal areas caused by human activities are the main factors that lead to the destruction of the ecological environment in seawater.

4. Land erosion, desertification and other destructive factors

5. Factors of sharp decline of forest resources < P > Worldwide, Due to natural or man-made factors, the forest area is decreasing sharply.

6. Acid rain hazards

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

7. Factors of accelerated extinction of species

Life on earth is a valuable resource for human beings, and biodiversity is the basis for human survival and development. But at present, biological species on earth are disappearing at an unprecedented speed.

8. Factors of water pollution

According to the water quality monitoring project of the global environmental monitoring system, About 1% of the monitored rivers in the world are polluted. Since the beginning of this century, the water consumption of human beings is rapidly increasing, and the scale of water pollution is constantly expanding, which has formed a contradiction between the supply and demand of fresh water. It can be seen that the treatment of water pollution will be very urgent and important.

9. Toxic waste pollution factors < P > The growing toxic chemicals not only pose a serious threat to human survival, Moreover, it will also bring harm to the ecological environment on the earth's surface.

1. Changes in the earth's periodic orbit < P > The earth's periodic orbit changes from elliptical to circular, which is closer to the sun. According to a scientist's research, the earth's temperature has alternated between high temperature and low temperature, which has certain regularity. The specific reason for the global warming trend is that, When people burn fossil minerals to generate energy or cut down forests and burn them, carbon dioxide enters the earth's atmosphere. * * * According to the climate model, the Panel on Climate Change predicted that by 21, the global temperature would rise by about 1.4-5.8 degrees Celsius (2.5-1.4 degrees Fahrenheit). According to this prediction, the global temperature would change dramatically in the past 1, years. Therefore, it will have a potentially significant impact on the global environment.

Question 3: What are the main reasons for global warming? People cut down trees in large quantities to make carbon dioxide exceed a certain content, which is like putting a cotton-padded jacket on the earth, which will have a greenhouse effect, the earth will be warmer, icebergs will melt, the sea level will rise and the weather will be abnormal. Global warming refers to the increase of global temperature. In recent 1 years, the global average temperature has experienced two fluctuations: cold-warm-cold-warm, which can always be regarded as an upward trend. Since the 198s, the global temperature has obviously increased. From 1981 to 199, the global average temperature increased by .48℃ compared with 1 years ago. The main cause of global warming is that human beings have used a lot of fossil fuels (such as coal and oil) in the past century, and emitted a lot of greenhouse gases such as CO2. These greenhouse gases are highly permeable to short-wave radiation from the sun and highly absorptive to long-wave radiation reflected from the earth, which is often called the greenhouse effect, leading to global warming. The consequences of global warming will redistribute global precipitation, melt glaciers and frozen soil, and raise sea level, which will not only endanger the balance of natural ecosystems, but also threaten human food supply and living environment.

The main causes of global warming: the destruction of the atmosphere, serious pollution and the possible impact of global warming. Global warming will bring complex potential impacts on the earth and human beings, both positive and negative. For example, with the increase of temperature, the sub-polar region may be more suitable for human habitation; Under appropriate conditions, higher carbon dioxide concentration can promote photosynthesis, thus making plants have higher carbon fixation rate, leading to the increase of plant growth, that is, the yield-increasing effect of carbon dioxide, which is a positive impact of global warming. However, compared with the positive impact, the negative impact of global warming on human activities will be more enormous and far-reaching. In August this year, CCTV reported that the peak of Mount Everest dropped by 1.3 meters due to the influence of climate warming. The shrinking of glaciers in Qilian Mountain endangers Hexi Corridor: In recent years, the melting of glaciers in Qilian Mountain has decreased by about 1 billion cubic meters compared with the 197s, and the snow line in some areas of glaciers is rising at an average annual rate of 2-2.6 meters. According to experts' analysis, in addition to natural climatic factors, glacier retreat and snow line rise are mainly caused by population expansion, overload and overgrazing, over-reclamation, deforestation and indiscriminate exploitation of groundwater. China environmental news September 16, 24

Question 4: What causes global warming? There are many reasons for global warming, which can be summarized as follows: Man-made factors 1. Population explosion The population explosion in recent years is one of the main factors leading to global warming. At the same time, it also seriously threatens the balance between natural ecological environment. With such a large population, the carbon dioxide emitted by itself every year will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, which will directly affect the climate change on the earth's surface. 2. atmospheric environmental pollution factors at present, the increasingly serious environmental pollution has constituted 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. 3. 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 5cm by the middle of the next century. If measures are not 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 in land activities are continuously discharged into the sea; Major oil spill events in seawater and the destruction of coastal ecological environment caused by human activities are the main factors that lead to the destruction of seawater ecological environment. 4. Inappropriate agricultural production is the main cause of soil erosion and desertification caused by land erosion, salinization and desertification. It is well known that good vegetation can keep soil erosion. But up to now, human activities, such as excessive deforestation, land reclamation for agricultural production and overgrazing, are still seriously destroying vegetation. At present, on average, 2 hectares of forests are destroyed every minute in the world, 1 hectares of land are desertified and 47, tons of soil are eroded. Soil erosion reduces soil fertility and water retention, thus reducing soil biological productivity and its ability to maintain productivity; It may also cause large-scale floods and sandstorms, cause great economic losses to society and worsen the ecological environment. 5. The factors of sharp decline of forest resources are worldwide, and the forest area is being sharply reduced due to natural or man-made factors. 6. Hazards of Acid Rain The impact of acid rain on the ecological environment has attracted more and more attention all over the world. Acid rain can destroy forests, acidify lakes and endanger living things. At present, acid rain in the world is mostly concentrated in Europe and North America, most of which occur in developed countries and some developing countries, and acid rain is also occurring and developing rapidly. 7. Factors of accelerated species extinction The life on the earth is a valuable 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. 8. Water pollution factors According to the water quality monitoring project of the global environmental monitoring system, about 1% of the monitored rivers in the world are polluted. Since this century, the water consumption of human beings is increasing rapidly, and the scale of water pollution is also expanding, which has formed a pair of contradictions between the supply and demand of fresh water. Thus, the treatment of water pollution will be very urgent and important. 9. Toxic chemicals with increasing toxic waste pollution factors not only pose a serious threat to human survival, but also will bring harm to the ecological environment on the earth's surface. Natural factors 1. The world is in a warm period. 2. The earth's periodic orbit changes. The earth's periodic orbit changes from oval to circular, 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, which has certain regularity.

Question 5: What are the main causes of global warming? What are the human activities and the massive consumption of energy? Humans have released carbon (coal, oil and natural gas) fixed by plants for hundreds of millions of years in just a hundred years. It is the rapid increase of carbon dioxide in the air and the remarkable enhancement of the global greenhouse effect that leads to global warming?

Question 6: What is the main cause of global warming? At present, the gap between galaxies is still expanding, and the distance between the earth and the sun is also expanding. It should have cooled the earth, but in recent decades, the earth is slowly getting hot. So some people beat the board of global warming on human's own fart clothes. In fact, this board is really unfair, and it is too unfair, because the carbon dioxide produced by human beings-and so on-has no impact on the global climate, but it has an impact, which is only nine Niu Yi hairs. Then why is the earth slowly drifting away from the sun and the climate warming in the opposite direction? We know that the tilt of the earth's axis makes the earth have four seasons. Then the sun's axis is tilted, and the solar system will inevitably produce four seasons similar to the earth. That is, the sun is now approaching the equator from the Tropic of Capricorn or Tropic of Cancer, which is similar to the earth, making the galactic light more and more direct to the solar system. That is to say, the global warming temperature is caused by more and more direct sunlight from the Milky Way. The spring and autumn seasons are abrupt, and the spring and autumn of the solar system caused by the inclination of the sun axis is also abrupt, so the earth is not only warming, but also often mixed with some extreme weather.