What are the hazards of air pollution?

Harm: the harm of atmospheric pollutants on the human body is multi-faceted, the main manifestation of respiratory diseases and physiological dysfunction, as well as eyes and nose and other mucosal tissues are stimulated by the disease, is the cause of asthma in old age, chronic factors, the lack of lung qi lead to physical decline. When the concentration of pollutants in the atmosphere is very high, it can cause acute pollution poisoning, or worsen the symptoms of the disease, and even take the lives of thousands of people in a few days. In fact, even if the concentration of pollutants in the atmosphere is not high, but the human body for years and years to breathe this polluted air, will also cause chronic bronchitis, bronchial asthma, emphysema and lung cancer and other diseases. 2, water pollution hazards: According to the world's authoritative institutions, in developing countries, 80% of all kinds of diseases because of drinking unhygienic water and the dissemination of water, every year due to drinking unhygienic water caused at least 2000 million deaths worldwide. Every year, drinking unhygienic water causes at least 20 million deaths in the world, therefore, water pollution is called "the world's number one killer". 3, the harm of noise pollution: the most direct harm of noise on the human body is hearing damage. When people enter the strong noise environment, exposure for a period of time, will feel the ears difficult, and even headache and other feelings. Because noise through the auditory organs in the central nervous system of the brain, so as to affect the whole body organs, so the noise in addition to the damage caused by human hearing, but also to the human body will bring harm to other systems. Because of the role of noise, will produce headache, brain swelling, tinnitus, insomnia, general fatigue and memory loss and other symptoms of neurasthenia.

Expanded information:

China's environmental conditions1, atmospheric pollution is a soot-type pollution to dust and acid rain is the most harmful, and the degree of pollution in the worsening.2, acid rain is mainly distributed in the South of the Yangtze River, east of the Tibetan Plateau and the Sichuan Basin. Acid rain pollution in central China is the heaviest. 3, rivers, lakes and reservoirs are generally polluted to varying degrees, except for some inland rivers and large reservoirs, pollution is aggravating the trend of pollution, pollution of waters near industrially developed cities and towns is particularly prominent. 4, the seven major water systems (the Pearl River, the Yangtze River, the Yellow River, the Huaihe River, the Hailuan River, the Liaohe River, the Songhua River) in the Yellow River Basin, Songhua River, Liaohe Basin water pollution is serious. 5, the large freshwater lake Total phosphorus, total nitrogen pollution is widespread, eutrophication is serious.6, the four major sea areas to the Bohai Sea and the East China Sea is more heavily polluted, the South China Sea is lighter.7, the deterioration of the ecological environment of the fishery waters has not fundamentally changed the situation, and is aggravating the trend. Baidu Encyclopedia - Protecting the EnvironmentEdited on 2020-10-24View all 16 replies

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What are the environmental problems around us what is the harm to people's body?1, atmospheric pollution: due to human activities or natural processes caused by certain substances into the atmosphere, presenting a sufficient concentration to reach a sufficient time, and therefore jeopardizes the comfort, health and welfare of the human body or the environment; the effects of atmospheric pollution on the human body, firstly, feel uncomfortable, followed by physiological reversible reactions, and then further on the acute harm symptoms. Atmospheric pollution can be roughly divided into acute poisoning, chronic poisoning, carcinogenic three kinds of harm. 2, water pollution: water pollution is caused by harmful chemicals that reduce the use of water or loss of value, polluting the environment of water; water pollution affects industrial production, increasing equipment corrosion, affect product quality, and even make the production can not go on. Water pollution, but also affects people's lives, destroying the ecology, directly endangering human health, damage is great. 3, noise pollution: from the physiological point of view, where interference with people's rest, study and work and the sound you want to listen to the sound of interference, that is, unwanted sound, collectively referred to as noise. When the noise on people and the surrounding environment to cause adverse effects, the formation of noise pollution. 4, solid waste pollution: people living in the environment, the atmosphere, water, soil as a medium, can be harmful waste in the environment directly from the respiratory tract, digestive tract or skin intake into the human body, making people sick. 5, computer radiation: radiation is not the number one factor leading to hair loss. Computer use for too long is the key to hair loss: a high degree of concentration on the use of computers, too long brain excitability will increase, endocrine disorders will occur, and the sebaceous glands connected to the hair follicles will be too much secretion will lead to follicle embolism, the supply of nutrients to the hair obstacles to the hair, hair will become brittle, the hair will fall out. For minor hair loss, you can reduce the use of computer time and regulate lifestyle to ease.8 Likes - 640 Views2020-10-28

What environmental problems exist around us, and what are the dangers to people's health?1, atmospheric pollution The hazards of atmospheric pollutants on the human body are multifaceted, the main manifestation of respiratory diseases and physiological dysfunction, as well as the eyes and nose and other mucous membrane tissue irritation and disease. The main manifestations are respiratory diseases and physiological dysfunction, as well as eye, nose and other mucous membrane tissue stimulation and disease. 2、Water Pollution If you drink contaminated water, pollutants will enter our bodies, leading to acute or chronic poisoning, but also cause a variety of infectious diseases. Extended information China's atmospheric environment is facing a very serious situation, the total amount of air pollutant emissions remain high. 2011 China's annual emissions of sulfur dioxide up to 18.57 million tons, 11.59 million tons of soot, 11.75 million tons of industrial dust, air pollution is still very serious. The quality of the air environment in most Chinese cities exceeds the standards set by China. Among the 47 key cities in China, about 70% or more of them have an atmospheric environmental quality that fails to meet the secondary standards set by China; among the 338 cities participating in the environmental statistics, the air environmental quality of 137 cities exceeds China's tertiary standards, which accounts for 40% of the cities in the statistics, and belongs to the severely polluted cities. Air pollution is the number one environmental pollution problem in China. The pollution levels of China's seven major water systems are, in order: the Liao River, the Hai River, the Huai River, the Yellow River, the Songhua River, the Pearl River, and the Yangtze River, of which 42% of the water quality exceeds the Class 3 standard (which can't be used as a drinking water source), and 36% of China's urban river segments are of inferior Class 5 water quality and have lost their function of use. The water quality of large freshwater lakes (reservoirs) and urban lakes is generally poor, and the Yellow River has repeatedly experienced breaks in flow, while more than 75% of the lakes have experienced increased eutrophication, mainly caused by nitrogen and phosphorus pollution. Baidu Encyclopedia - China's top ten environmental problems23 Likes - 2,806 Views2020-10-29

What environmental problems exist around us, and what are the hazards to people's health?1. Noise Hazard Affects the quality of sleep. Studies have shown that 40 to 50 decibels of noise will interfere with sleep. 40 decibels of sudden noise can make 10% of the people wake up, 60 decibels can make 70% of the people wake up. When the continuous noise reaches 70 decibels, it will affect 50% of people's sleep. 2, the harm of air pollution The harm of air pollutants on the human body is multifaceted, manifested in the respiratory system is damaged, physiological dysfunction, digestive system disorders, nervous system abnormalities, intellectual decline, carcinogenic, disabling. People call this catastrophic smog the "killer smog". When the concentration of pollutants in the atmosphere is very high, it can cause acute pollution poisoning, or worsen the symptoms of the disease, and even take the lives of thousands of people in a few days. In fact, even if the concentration of pollutants in the atmosphere is not high, but the human body adult years and years of breathing this polluted air, but also will cause chronic bronchitis, bronchial asthma, emphysema and lung cancer and other diseases.

Expanded information:

Methods of prevention and control 1, for the factory sewage, exhaust, waste smoke, waste residue and other toxic gases to be filtered and then emitted. 2, go out and try not to use private cars, reduce the environmental pollution caused by automobile emissions. 3、Don't use disposable tableware, save paper. 4, more planting plants and trees, do not cut down indiscriminately.

Reference:

People's Daily Online - The Killer of Human Public ****Health Noise Hazard Second to Air Pollution

Reference:

Baidu Encyclopedia-Environmental Pollution17 Likes-4,650 Views2020-10-26

What are the environmental problems around us, and what are the hazards to people's health? The most direct and easily felt consequences of environmental pollution are the degradation of the quality of the human environment, affecting the quality of human life, physical health and productive activities. Environmental Problems: 1. Resource Destruction Human beings have over-consumed all kinds of mineral resources. According to traditional consumption calculations, the world's oil is only enough to maintain 50 years, coal, natural gas is only enough to mine 200-300 years. 2, ecological damage Since the last century 50 years, due to human over-exploitation, the global forest resources have lost a large part, the degree of desertification has increased, land degradation and a series of problems have intensified, the natural world is seriously damaged, the ecosystem function is weakened, affecting the survival of human beings. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), 2,500 square meters of forests are destroyed every minute on earth. 3, land desertification worldwide desertified land area accounts for 1/3 of the world's land area, amounting to about 48 million km?, almost China, India, the United States and Russia's total country. The main reason for land desertification is the aggravation of soil erosion, such as China's soil erosion area of 1.5 million km?, so that a lot of fertilizers in vain, China's desertified land has 176,000 km?, the annual loss of a variety of micronutrients amounted to 4 million tons, the loss of serious. 4、Species reduction There are about 13 million to 14 million global species. Among them, there are about 1.7 million species that have been named by human beings, and most of the existing species have not yet been recorded and described. According to statistics, 75 species go extinct every day and 3 species go extinct every hour around the world. Because of the food chain, for every plant that disappears from the planet, 10 to 30 species of animals and microorganisms dependent on that plant often disappear as well. The loss of each species reduces the options available to nature and humans to adapt to changing conditions. The reduction of biodiversity will certainly deteriorate the living environment of human beings, limit the choice of opportunities for human survival and development, and even seriously threaten the survival and development of human beings. 5, sandstorms and dust storms by statistics, the 1960s, large sandstorms in our country occurred 8 times, 13 times in the 70s, 14 times in the 80s, and more than 20 times in the 90s, to the 21st century, the scope of its wider and wider, resulting in more and more losses 6, soil erosion refers to the role of the water, soil erosion, transportation and sedimentation of the entire process. In the natural state, purely by natural factors caused by the surface erosion process is very slow, often with the soil formation process is in relative balance. Thus the sloping land remains intact. This type of erosion is called natural erosion, also known as geological erosion. Under the influence of human activities, especially after the serious destruction of human vegetation on slopes, the surface soil damage caused by natural factors and the movement of land material, the loss process is accelerated, that is, soil erosion occurs. 7, living environment deterioration Environmental degradation is caused by the industrial civilization to human beings caused by the unsustainable development of the outstanding problems. 1952 London smog event, 4000 people died within 5 days. Others such as water pollution, acid rain, photochemical pollution, global warming, white trash, land pollution, etc. are all manifestations of the destruction of nature. Extended information Correctly handle the relationship between environmental protection and development, environmental protection and economic development is an organically linked whole. Neither can we leave development and unilaterally emphasize the protection and improvement of the environment, nor can we blindly pursue development without regard to the capacity of the ecological environment. Developing countries, in particular, could only seek ways and means of solving environmental problems that suited their national conditions on the premise of moderate economic growth. The broad participation of developing countries is essential. In international environmental affairs, there is a tendency to ignore the specific difficulties of developing countries, and their voices are not adequately reflected. Therefore, it is necessary to take measures to ensure that developing countries can fully participate in international environmental activities and cooperation. The special circumstances and needs of developing countries should be fully taken into account. Developing countries are also faced with some more pressing localized environmental problems, ranging from natural ecological deterioration such as land degradation, desertification, forest decline, soil erosion, etc., caused by lack of funds, backward technology and population growth, to environmental pollution, acid deposition, and water scarcity, etc., caused by industrial development. Baidu Encyclopedia-Environmental Problems Baidu Encyclopedia-Environmental Deterioration7 Likes-1,493 Views2020-10-20

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