Global warming will do harm to human beingsPPT
As early as the end of the 20th century, scientists boldly put forward the wo...
As early as the end of the 20th century, scientists boldly put forward the word "global warming". At that time, people thought it was alarmist. However, the extreme weather that followed made people realize that it was a fact. Now some scholars believe that global warming will lead to premature birth of infants, affect the health of children, and may also have an impact on the human heart.Many scholars have even discussed that global warming has greater impact on human beings than environmental pollution, and global warming is more harmful than nuclear weapons. However, after reviewing the data, we found that this is not alarmist. Next, we will report on the impact factors, hazards and what we should do about global warming. Influential factors of global warmingAlthough global warming is a natural phenomenon, it is also closely related to human activities. Greenhouse gas emissionsFor nearly a century, human beings have used a large number of fossil fuels, such as kerosene and natural gas, in order to develop science and technology and improve productivity. The burning of these fuels will emit a large amount of carbon dioxide and other greenhouse gases, which is also one of the biggest factors leading to global warming. In the 21st century, the research on global climate change clearly shows that the temperature of the earth's surface has been rising since the end of the last century. Global population explosionHuman activities are also important factors affecting global warming. In order to meet the needs of human beings, a large number of forests and wetlands have been destroyed. The reduction of vegetation leads to the inability to fully absorb these greenhouse gases and the decline of photosynthesis, which leads to the greenhouse effect and global warming. Natural factorsFor example, the earth's periodic orbit changes and volcanic movements. Hazards of global warming Ecological environment is damaged(1) After global warming, the ice and snow of the Antarctic Peninsula and the Arctic Ocean may melt, the vegetation will recover, and the poor polar bears and walruses will become homeless and extinct.(1) It is no longer a story that the sea level rises, the lowlands are flooded, and the beautiful coastal cities gradually integrate with the sea floor. Tuvalu, a beautiful island country in the South Pacific, is likely to become the first "sunken" country. The country's meteorological bureau calculates that the sea level will rise 37.6cm in 50 years, which means that at least 60% of Tuvalu's territory will sink into the sea. In addition, island countries such as Maldives will disappear from the map, and even China's Shanghai will become a water city.(3) It causes the loss of coastal wetlands, mangroves, coral reefs and other ecological groups. Frequent climate disasters: global warming has increased precipitation in the mainland, especially in middle and high latitudes, and reduced precipitation in Africa and other regions. Mountain fires occur frequently, endangering people's lives.Research results show that from 2000 to 2019, unsuitable outdoor temperature was associated with more than 5 million excess deaths each year, that is, 74 temperature related deaths per 100000 residents, accounting for 9.43% of the global total causes of death. Human health is affected(1) An American scientist once warned that the Arctic ice would melt due to the global temperature rise, and the prehistoric deadly viruses that had been frozen for more than 100000 years might come to light again. At present, human beings have no resistance to these primitive viruses, and human life will be seriously threatened. Global warming directly leads to ultra-high temperature in some regions in summer, heart disease and various respiratory diseases caused by it, which will kill many people every year, among which newborn babies and the elderly are the most dangerous.(2) Climate warming leads to an increase in ozone concentration. Ozone in the low air is a very dangerous pollutant, which can damage people's lung tissue and cause asthma or other lung diseases. It also causes the spread of certain infectious diseases.The frequent extreme weather in recent years seems to tell us that it is not impossible. The harm of global warming is worldwide and far less harmful than the above list. People often call for not cutting down forests, saving energy and reducing emissions, and protecting the environment, but many people feel that this has nothing to do with themselves.In fact, global warming will seriously threaten our human survival. So it is the old saying that "the earth is my home, and the environment depends on everyone". We should pay attention to the harm caused by global warming.
