How harmful is global warming? Is there any good way to stop it?

Global warming is a "natural phenomenon". Because people burn fossil minerals to generate energy or cut down forests to burn, many greenhouse gases, such as carbon dioxide, are produced. This gas has high permeability to visible light from the sun and high absorption to long-wave radiation reflected from the earth, which is commonly called "greenhouse effect" and leads to global warming. In recent 100 years, the global average temperature has experienced two fluctuations: cold-warm-cold-warm, with an overall upward trend. Since 1980s, the global temperature has obviously increased. 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 background of global warming Global warming refers to the rise of global temperature. In recent 100 years, the global average temperature has experienced two fluctuations: cold-warm-cold-warm, with an overall upward trend. Since 1980s, the global temperature has obviously increased. 198 1 ~ 1990, the global average temperature increased by 0.48℃ compared with 100 years ago. The main reason for global warming is that humans have used a lot of fossil fuels (such as coal and oil) and released a lot of greenhouse gases, such as carbon dioxide, in the past century. Because these greenhouse gases have high permeability to visible light radiated by the sun and high absorption to long-wave radiation reflected by the earth, this is commonly called "greenhouse effect", which leads 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 specific reason for the global warming trend is that people burn fossil minerals to generate energy or cut down forests and burn them to produce carbon dioxide that enters the earth's atmosphere. According to the climate model, the Intergovernmental Panel on Climate Change predicts that by 2 100, the global temperature will rise by about 1.4-5.8 degrees Celsius (2.5- 10.4 degrees Fahrenheit). According to this forecast, in the past 65,438+00,000 years, the global temperature will change dramatically, which will have a potentially significant impact on the global environment. In order to stop the global warming trend, the United Nations specially formulated 1992 "United Nations Framework Convention on Climate Change", which was signed into effect in the Brazilian city of Rio de Janeiro in the same year. According to this convention, developed countries agreed to reduce their carbon dioxide and other "greenhouse gases" into the atmosphere to the level of 1990 by the year 2000. In addition, countries with total carbon dioxide emissions accounting for 60% of the global total carbon dioxide emissions in these years have also agreed to transfer relevant technologies and information to developing countries. These technologies and information transferred from developed countries to developing countries will help developing countries actively respond to the challenges brought by climate change. As of May 2004, 189 countries have formally ratified the above convention. History and forecast of global warming. Global warming is real, and it continues! The mainstream scientific community agrees that global warming is becoming more and more clear. It is true that our climate is changing every day, and they are making progress. Since the end of the 20th century, the average temperature of the earth's surface has increased by about 1. 1f (0.6 degrees Celsius). In the past 40 years, the temperature has risen by about 0.5f (0.2-0.3 degrees Celsius). In the past 400-600 years, global warming surpassed any period in history in the 20th century. In the 20th century, there were 65,438+00 years, which occurred in the 1990s, because the strongest afternoon, 65,438+0998 was the hottest year, because reliable temperature measurement began. In addition, the change of natural environment supports the fact that the earth is warming; Glass factories in mountainous areas are also gradually declining; In the past forty years, the thickness of Arctic ice has decreased by about 40%. The global sea level has risen about three times, exceeding the past 100 years. Compared with the previous 3000 years, more and more studies show that plants and animals will change their range of activities and behaviors to cope with the climate. According to the instrument records, compared with the period from 1860 to 1900, the global land and ocean temperature rose by 0.75 degrees Celsius. Since 1979, the land temperature has risen twice as fast as the ocean temperature (the land temperature has risen by 0.25 degrees Celsius, while the ocean temperature has risen by 0. 13 degrees Celsius). According to satellite temperature detection, the troposphere temperature rises by 0. 12℃ to 0.22℃ every ten years. Before 1850 1000-2000, although there were warm periods and little ice ages in the middle ages, people thought that the global temperature was relatively stable. According to the research report of Goddard Space Research Institute of NASA, it is estimated that 2005 is the warmest year, which is higher than the record of 1998, because measuring instruments were widely used in 1960s! ! ! In order to effectively stop the trend of ecological deterioration, in recent years, under the guidance of the western development policy and the strong support of river basin institutions, ecological management, construction and reconstruction of beautiful mountains and rivers have been taken as the leading direction of future work development, and ecological engineering construction of soil and water conservation with emphasis on ecological resource protection, planting trees and grass, soil and water conservation and sand prevention and control has been carried out, and grassland construction and ecological agriculture have been carried out in combination with reality, and eight key control areas with different main directions of ecological construction have been established.