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Anonymous users2024-02-11If you close your eyes, you won't be polluted.
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Anonymous users2024-02-10Light pollution refers to the phenomenon of excessive use of light or the use of inappropriate light sources at night, resulting in an increase in light in the atmosphere, causing various problems. The main causes of light pollution are as follows:
1.Urbanization is developing rapidly. The rapid development of urbanization has brought more and more people and buildings, and the increase in population and buildings requires more and more light, so the use of urban night light sources is increasing.
2.The development of science and technology and the improvement of people's living standards. With the rapid development of science and technology, the improvement of transportation and urban construction, people's work and lifestyle have undergone tremendous changes, and the key requirements for lighting quality are getting higher and higher, so more and stronger light sources are needed, and these light sources need to be illuminated 24 hours a day.
3.Public safety needs. The need for public safety is one of the main reasons for cities to use nighttime lighting, such as street lights or exterior lighting of buildings, which can provide adequate lighting and security for citizens at night.
4.People's requirements for the landscape. In order to meet people's demand for night scenes, many cities use night scenes as a means of urban promotion, making night scene lighting more and more cumbersome.
In this case, a large amount of lighting and lighting equipment is often required to achieve the landscape effect, increasing the degree of light pollution.
In general, the causes of light pollution are many, including rapid urbanization, scientific and technological progress, and the improvement of living standards. Light pollution has brought many problems to people, such as biological rhythm disorders, obstruction of viewing astronomical scenes, etc., so the degree of light pollution should be controlled as much as possible to protect the ecological environment and people's health. <>
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Anonymous users2024-02-09Photochemical pollution refers to the pollution caused by photochemical smog.
Photochemical smog is mainly caused by automobile exhaust and industrial exhaust emissions, and the olefin hydrocarbons and nitrogen dioxide in automobile exhaust are emitted into the atmosphere, and under the strong sunlight ultraviolet radiation, they will absorb the energy of sunlight. The molecules of these substances, after absorbing the energy of sunlight, become unstable, and the original chemical chain is destroyed, forming new substances. This chemical reaction is called a photochemical reaction, and its product is a highly toxic photochemical smog.
Nitrogen oxides mainly refer to nitric oxide and nitrogen dioxide, which are primary pollutants in photochemical pollution. Nitric oxide and nitrogen dioxide are both harmful photochemical pollutants to the human body.
of gases. Nitrogen oxides and hydrocarbons are irradiated by strong solar ultraviolet rays in the atmospheric environment to produce a new secondary pollutant, photochemical smog, in this complex photochemical reaction process, mainly produces photochemical oxidants and other complex compounds, collectively referred to as photochemical smog.
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Anonymous users2024-02-081. Pay attention to controlling the source of light pollution.
2. Researchers should also explore ways to reduce light pollution in science and technology. In the design scheme, the light source is reasonably selected.
3. Adopt personal protective measures: protective goggles, protective masks, protective clothing, etc. Eliminate the harm of light pollution in the bud. Those who have symptoms should go to the ophthalmology department of the hospital regularly for examination, and find out the condition in time.
It is recommended to formulate uniform technical standards for the scope, design, fabrication and installation of glass curtain walls in cities (or restrict the use of glass curtain walls, etc.).
Reduce the use of glass curtain walls.
Buildings such as shopping malls should not use glass curtain walls, and try to install neon signs as little as possible.
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Anonymous users2024-02-07It is necessary to enact legislation as early as possible to monitor and control the light intensity of billboards, and limit the opening time and radiation area.
Measures to reduce light pollution include: 1. Avoid unnecessary and excessive light; 2. Use qualified lighting equipment, such as using lamps and lanterns that are appropriately bright, only illuminate the areas or objects that need to be illuminated, and prevent places that do not need to be illuminated and objects from receiving light passively; 3. Choose the appropriate lighting method and strictly control the time and space of lighting. >>>More
This problem is relatively big, the traditional papermaking method is more polluting, the pollution is mainly water pollution, you can choose the best papermaking additives to reduce the concentration of white water, you can also take DMC clean pulping technology, no sewage discharge, water saving 98%, in addition to the more traditional pollution control methods, which index exceeds the standard plus the corresponding thing to reduce, waste not to say, pollution is greater!
Water treatment should be carried out according to regulations. Otherwise, the paper mill should be closed. But the local environmental protection department can't do it. There are so many things involved.
Because of the needs of life, many people use plastic bags, because they are disposable items, but they are not degraded, causing pollution, which is "white pollution".
In addition to people's failure to understand the laws of natural ecology, the main reason for the pollution and destruction of the environment is that people do not comprehensively weigh the relationship between economic development and environmental protection, only consider the direct economic effects of the short term, and ignore the long-term impact of economic development on nature and society. For a long time, people regarded environmental resources such as water and air as inexhaustible "free resources", and used nature as a place to purify waste, without having to pay any price and labor. In an era when the scale of production is small and the population is small, the impact of this way of economic development on nature and society is limited in terms of time, space, and length. >>>More