Report on investigation, analysis, conclusions and suggestions on environmental protection for fourth grade primary school students, composition

Causes

1. Factors of rapid population growth

The rapid growth of population in recent years is one of the main factors leading to global warming. Such a large population will emit a staggering amount of carbon dioxide every year. The result will be a direct increase in the content of carbon dioxide in the atmosphere. The carbon dioxide "greenhouse effect" formed in this way will directly affect the climate on the earth's surface. change. 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, research on global climate change has clearly shown that Earth's surface temperatures have been rising since the end of the last century. 3. Factors deteriorating the marine ecological environment At present, sea level changes are showing a continuous upward trend. According to the predictions of relevant experts, the sea level may rise by 50cm by the middle of the next century. If appropriate 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 amount of toxic chemical waste and solid waste generated by land-based activities are continuously discharged into the ocean; major oil spills (leakage) incidents in seawater, as well as damage to the ecological environment in coastal areas caused by human activities, etc. It is the main factor leading to the destruction of the seawater ecological environment. 4. Destructive factors such as land erosion and desertification. 5. Factors of sharp decline in forest resources. Worldwide, forest areas are declining significantly due to natural or man-made factors. 6. Hazardous factors of acid rain The impact of acid rain on the ecological environment has attracted more and more attention around the world. Acid rain can destroy forests, acidify lakes, and endanger organisms. At present, acid rain in the world is mostly concentrated in Europe and North America. Most acid rain occurs in developed countries. In some developing countries, acid rain is also occurring and developing rapidly. 8. Water pollution factors. According to the water quality monitoring project of the Global Environmental Monitoring System, about 10% of the monitored river water in the world is polluted. Since this century, human water consumption is increasing dramatically, and the scale of water pollution is also expanding. This This creates a contradiction between supply and demand for fresh water. It can be seen that the treatment of water pollution will be very urgent and important. 9. Toxic waste pollution factors The ever-increasing number of toxic chemicals not only poses a serious threat to human survival, but will also cause harm to the ecological environment on the earth's surface. 10 Changes in the Earth’s periodic orbit: The Earth’s periodic orbit changes from an ellipse to a circular orbit, getting closer to the sun. According to the research of a certain scientist, the temperature of the earth has experienced alternations of high and low temperatures, and there is a certain regularity.

Luo Yong, deputy director of the National Climate Center of the China Meteorological Administration, said that according to the predictions of many scientists in the world, humans will completely enter a warming world in the next 50 to 100 years. Due to the influence of human activities, the concentration of greenhouse gases and sulfide aerosols has increased rapidly in the 21st century, causing the temperature of the world, East Asia and my country to rise rapidly in the next 100 years. The global average surface temperature will increase by 1.4℃-5.8℃. By 2050, my country's average temperature will rise by 2.2°C. "The rare occurrence of heavy fog since the beginning of winter is also a sign of a warm winter." Luo Yong said that the heavy fog is caused by the "warm winter" causing strong cold air to be very weak. The reality of global warming is constantly sounding the alarm to countries around the world. Climate warming has seriously affected human survival and the sustainable development of society. It is not only a scientific issue, but also a problem covering politics, economy, energy and other aspects. A comprehensive issue, the fact of global warming has risen to the level of national security

Temperature predictions of global warming German researchers said that future global temperatures may be much higher than some scientists have previously done predictions, if the predictions made by new computer models about climate change are correct. According to Reuters, the Intergovernmental Panel on Climate Change (IPCC, which is composed of meteorological experts from various countries and studies global climate trends) has previously predicted that by the end of this century, global temperatures will increase by 1.5 to 4.5 degrees Celsius as carbon dioxide doubles. However, the latest calculation method by Professor Meinrath Andrée of the Max Planck Institute of Chemistry in Mainz, Germany, and his research team shows that the maximum increase in global temperature can reach 6 degrees Celsius. Professor Andrei said that this new method unifies aerosols, greenhouse gases and biosphere effects, changing previous predictions of climate change from a level that people can tolerate to a more rapidly changing danger. situation. Professor Andrei compared greenhouse gases to accelerators that cause global warming, while the presence of suspended particles can slow down the rise in temperature. Particulates are tiny particles in the air produced by combustion, chemicals and smoke. With the use of new air conditioning units, the number of suspended particles will be reduced and therefore their cooling effectiveness will be reduced. On the contrary, global temperatures will rise. Particulate matter can only stay in the atmosphere for a week, while greenhouse gases can stay in the atmosphere for more than 50 years. That is, the cooling effect of aerosols decreases faster, while greenhouse gases decrease more slowly. In this way, in the long-term race, greenhouse gases will eventually defeat particulate matter, and scorching hot weather will follow. However, Professor Andrei also admitted that this situation has a high degree of scientific uncertainty and that climate changes are far beyond the scope of experience and scientific understanding.

If his calculations are correct, climate change in the 21st century will exceed the Intergovernmental Panel on Climate Change's predictions. In another seven years, the global climate will be irreversibly warming.

Consequences of global warming 1. The climate becomes warmer, glaciers melt, and sea levels will rise, causing the loss of ecological groups such as coastal tidal wetlands, mangroves, and coral reefs, coastal erosion, and seawater intrusion into coastal underground fresh water. layer, coastal land salinization, etc., thus causing an imbalance in the natural ecological environment of coasts, estuaries, and bays, and bringing disaster to the coastal ecological environment system. 2. The water area increases. More water is evaporating, the rainy season is lengthening, and floods are becoming more frequent. The chance of flooding increases, the extent and severity of storm impacts increases, and the life of reservoir dams shortens.