The cause of global warming

Question 1: What causes global warming? There are many reasons for global warming, which can be summarized as: human factors 1. In recent years, the population explosion is one of the main factors leading to global warming. 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. 2. atmospheric environmental pollution factors at present, the increasingly serious environmental pollution has constituted a major global problem and 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, sea level changes are 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. 4. Improper agricultural production is the main cause of soil erosion and desertification caused by soil erosion, salinization and desertification. As we all know, good vegetation can prevent soil erosion. But today, human activities, such as excessive deforestation, land reclamation for agricultural production and overgrazing, are still seriously destroying vegetation. At present, on average, 20 hectares of forests are destroyed, 65,438+00 hectares of land are desertified and 47,000 tons of soil are eroded every minute in the world. Soil erosion reduces soil fertility and water retention, thus reducing soil biological productivity and its ability to maintain productivity; It may also lead to large-scale floods and sandstorms, causing huge economic losses to society and deteriorating the ecological environment. 5. The sharp decline of forest resources is worldwide, and the forest area is decreasing sharply due to natural or man-made factors. 6. The harm of acid rain The impact of acid rain on the 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. 7. Factors that accelerate the extinction of species 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. 8. Water pollution factors According to the water quality monitoring project of the 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. 9. Toxic chemicals with increasing toxic waste pollution factors not only pose a serious threat to human survival, but also bring harm to the ecological environment on the earth's surface. Natural factors 1. The world is in a warm period. 2. Periodic orbital changes of the earth. 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.

Question 2: What are the main causes of global warming? Human activities, a large amount of energy consumption, carbon (coal, oil, natural gas) released by plants after hundreds of millions of years in just a hundred years, the rapid increase of carbon dioxide in the air and the remarkable enhancement of global greenhouse effect have led to global warming.

Question 3: What are the man-made causes of global warming?

1. Population explosion factor

The rapid growth of population is one of the main factors leading to global warming. At the same time, it also seriously threatens the balance between the natural ecological environment. With such a huge 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, thus directly affecting the climate change on the earth's surface.

2. Atmospheric environmental pollution factors

The increasingly serious environmental pollution has become a major global problem, and it is also one of the main factors leading to global warming. The research on global climate change in 2 1 century has clearly pointed out that the temperature of the earth's surface has been rising since the end of last century.

3. Deteriorating factors of marine ecological environment

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.

4. Factors of sharp decline of forest resources

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

natural cause

1. Volcanic activity

2. Periodic orbital changes of the earth.

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.

3. Icebergs melt

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. The researchers warned that these large amounts of poisons gathered in the polar regions are unknown, and their release will seriously endanger the living environment of marine life and human beings. These seeping chemicals include pesticides DDT and chlordane. All these are persistent organic pollutants, which may cause cancer and birth defects, and were previously captured by Arctic ice and frozen water. However, scientists in Norway and Canada found that global warming was making these pollutants "reborn" when monitoring the measurement results of 1993 and 2009.

4. Solar activity

Some experts believe that 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, mainly due to the sun; Some scientists in the United States also believe that the main cause of climate change is the sun. During the period of 1975 ~2000, the solar magnetic circulation curve is almost consistent with the surface temperature curve in the northern hemisphere. 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, researchers in Japan and Denmark recently pointed out that the increase of greenhouse gases is not the only cause of climate warming, but the change of solar activity has also played a role in promoting it.

Question 4: What are the main causes of global warming? BIGBANG's energy is still enlarging the gap between galaxies, and the distance between the earth and the sun is also enlarging. It was supposed to make the earth cool, but in recent decades, the earth is getting warmer. So some people play the board of global warming on human's own fart clothes. In fact, this board is really unfair, so unfair, because the carbon dioxide produced by human beings-and so on-has no effect on the global climate, but it does, and it is only nine Niu Yi hairs. Then why is the earth slowly moving away from the sun and climate warming in the opposite direction? We know that the tilt of the earth axis makes the earth have four seasons. Then the axis of the sun 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. In other words, the global warming temperature is caused by more and more direct sunlight from the Milky Way. Spring and autumn are abrupt changes, and so are the spring and autumn of the solar system caused by the tilt of the sun axis, so the earth is not only warming, but also often mixed with some extreme weather.

Question 5: What are the natural causes of global warming? The natural cause of global warming is the abnormal activity of the sun.