The mere pollution problem is serious

The mere pollution problem is serious

Fig.: Utah State Leamington town of U.S.A. (population 217) With Orem city (population 400,000) Night sky last " the universe " magazine to report whether last a in the world 1/5 population light pollution already - -It is mainly Continental Europe, Britain and U.S.A. - -Can't see the Milk Way at night. " appreciate in the night sky the beautiful Galaxy is present to a human splendid present of ours of natured " " unfortunately that the astronomer ConnieWalker of the national optical observatory of U.S.A. says so, there is more than 1/5 of the population (U.S.A. have 2/3 in the world today, half of Europe) It has been already unable to see the Milk Way through the naked eye " .

There is no stars night

Fig.: Light pollution
Walker warns, the light pollution not only will influence astronomical observation, but also will influence human health. The light pollution is so so light that upset the human biological clock that cause the sleep and difficult, even heavier. " the international biological clock is studied " there will be an article to report, the scientist finds 147 communities in Israel after making investigations in 2008 in the periodical, the probability that the place women with the more serious light pollution suffer from breast cancer increases greatly. The reason may be melatonin that because night only can not influence the women naturally (melatonin, the intersection of another name and N - acetyl - 5 - the intersection of methoxy and the intersection of color and amine, come and control the human biological clock mainly) With the secretion of hormone such as estrogen.

There are varied forms in the light pollution, can be divided into white and light pollution, manpower polluting and colorful light pollution of daytime mainly. It is polluted that white and light, when the sunshine shines strongly, brick wall the glass curtain wall, glaze in the building in the city, polishing marble and various coating,etc. is ornamental to reflect the light, shining white and light, dizzy eyes are brilliant. Expert discover person that work and live when being white and light to pollute the environment for a long time, retina and iris will all receive different damages of intensity, eyesight will drop suddenly, the morbidity of cataract is up to 45%. Will also make people dizzy and vexed, even present appetite decline, depressed, such neurasthenia -like symptoms as the health is weak.

Manpower is polluted in daytime, after the night comes, advertising light, neon lamp on the store, hotel glimmer brilliantly, drazzling. Some strong light beam go to the skies directly even, make night the daytime, namely the so-called manpower daytime. The such one " The ever-bright city " In, it is difficult to fall asleep at night, upset human body's normal biological clock, lead to the fact working efficiency is low in the daytime. Manpower will also injure birds and insect in daytime, the strong light may destroy insects in the normal reproduction course at night.

Fig.: The colorful light pollution of the light pollution, dance hall, rotatory light, fluorescent lamp and flashing colored light source which the night club installed form colorful light pollution. According to surveying and determination, the intersection of black light and the intersection of ultraviolet ray and the intersection of intensity and on ultraviolet ray in the sunlight greatly light produce, and long to the duration of human adverse effect. If people accept for a long time this kind shines, can bring out and flow epistaxis, take off tooth, cataract, even cause leukemia and other canceration.

" the earth of dim light of night " Plan:

It say let Walker realize the public by that light pollution fully mainly in that - -It influences every aspect of human life, has been seen from the simplest one less than the Galaxy to influence animal's habits and acquired characteristics, waste energies, hinder economic development Certainly, still influence astronomy to study.

One that the scientists initiated is called " the earth of dim light of night (GlobalatNight, GN) " Plan: Namely the volunteers from all parts of the world note the star chart of luminance of night sky in ground at night, upload the data to a scientist in the hand through Internet, can draw the global light pollution distribution map in this way. GN plans to last 2 weeks each time once a year. In the past 4 years, GN planned to collect more than 100 countries all parts of the world and add up to the record information of 35000 pieces of light pollution.

Walker,etc. by this can judge which can see the Milk Way on the local dim light of night, which places see, and the corresponding size of population.

Australian National University (AustralianNationalUniversity, ANU) Affiliated the intersection of MountStromloandSidingSpring and JohnNorris of observatory say light pollution in the intersection of Australia and good great problem by sheer good luck, because its every city with a small population in a large area is separated by very far each other. But bright sodium (or mercury) The vaporized light will still increase the background luminance, thus bring very great trouble to astronomical observation.

" in order to obtain the high-quality data, I have to lengthen and observe time " ,Norris puts emphasis on arriving again, " the astronomer particularly wants to defend night urgently! " . He continued saying again, in observatory and ANU of the two countries of Australia of Great Britain, we had already and reached an agreement in the local government: If someone will set up a certain big lighting facility, he must obtain consent of local government at first.

The mere pollution problem is serious