What harm does light pollution cause? How to reduce light pollution?

Internationally, light pollution is generally divided into 3 categories, namely, white bright pollution, artificial daylight and colored light pollution.

White light pollution When the sun shines strongly, the glass curtain walls of buildings in the city, glazed brick walls, polished marble and all kinds of paint and other decorative reflections of light, bright white, dazzling. Expert research has found that long time in the white light pollution environment work and life, retina and iris will be subject to varying degrees of damage, sharp decline in visual acuity, cataract incidence rate of up to 45%. It also makes people dizzy and upset, and even insomnia, loss of appetite, depression, weakness and other symptoms similar to neurasthenia.

Summer, the glass curtain wall strong reflection of light into the nearby residential buildings, increasing the indoor temperature, affecting normal life. Some glass curtain walls are semicircular, reflected light convergence is also easy to cause fire. Drivers driving under the hot sun will be surprised by the sudden attack of the glass curtain wall reflecting light, the eyes are strongly stimulated, it is easy to induce a car accident. Artificial day After nightfall, shopping malls, hotels on the advertising lights, neon lights flashing eye-catching, dazzling. Some strong beams of light even go straight up to the sky, making the night as if it were daytime, the so-called artificial daytime. In such a "night city", it is difficult to sleep at night, disrupting the body's normal biological clock, leading to low efficiency during the day. Artificial daylight also harms birds and insects, and bright light may disrupt the normal breeding process of insects at night.

Colored light pollution Black lights, rotating lights, fluorescent lights and flashing colored light sources installed in dance halls and nightclubs constitute colored light pollution. It has been determined that the black light produced by the ultraviolet intensity is much higher than the sun's ultraviolet light, and the harmful effects on the human body for a long time. If a person receives this kind of irradiation for a long time, it can induce nosebleeds, tooth loss, cataracts, and even lead to leukemia and other cancers. Colored light source dazzling, not only for the eyes, and interfere with the central nervous system of the brain, make people feel dizzy, nausea and vomiting, insomnia and other symptoms. Scientists have shown that the latest research, colored light pollution is not only detrimental to human physiological function, but also affect mental health.