With the development of city buildings, the light pollution is becoming more and more serious. The most common light pollutions in the cities are the reflection of the tall building, while apart from it, there still exists a lot more. So based on their nature, we may introduce the following different types of light pollutions.


A: Light pollution classification
Generally light pollution can be classified into three categories, respectively white light pollution, daylight and artificial light pollution.

(1) White light pollution.

Strong sunlight, the glass walls of the city buildings, glazed walls, polished marble and various other decorative paints who can reflect light, glittering white light, blinding eye-catching. Studies have found that, for those who have been receiving long time white light pollution may suffering varying degrees of damage, like a sharp decline in vision; what’s more, it also makes people upset, dizziness, insomnia and even loss of appetite, depression, physical fatigue and other symptoms.

(2) Artificial daylight pollution.

During the night, shopping malls, advertising lights on hotels, flash dazzling etc. Some even can beam into the sky, making the night as during the day, it is so-called artificial daylight. This artificial daylight pollution is majorly in the huge cities like New York, London, Paris, Tokyo, Shanghai, HK etc. In these "cities that never sleeps", the night is relatively sparking, disrupting the body's normal biological clock, resulting in low productivity during the day. Artificial daylight will also hurt birds and insects;

(3) Widespread light pollution.

Discos, nightclubs, rotating lights, fluorescent and colored light flashing constitute of widespread light pollution. Long-term exposure can induce nosebleeds, teeth, cataracts, and even lead to cancer. Dazzling color light source, is detrimental to the eyes, brain and central nervous system, people will feel dizzy, nausea, vomiting, insomnia and may also suffer other symptoms.
People began to pay attention to the prevention of possible widespread light pollution; China has introduced a number of regulations on urban architecture in the use of glass curtain. In 2002 Beijing has developed a veto glass curtain wall in order to prevent such pollution. So far, more than 30 Chinese cities, including Shanghai and Nanjing, have adopted such technique.

B: China's current "Environmental Protection Law" towards light pollution
"People's Republic of China Environmental Protection Law" Article 24 indicates that: all actions concerning about light pollution which may cause environmental pollution and other public hazards, must incorporate environmental protection into their plans and establish a responsibility system for environmental protection, taking effective measures to combat the generated emissions in the production or other activities.(It is also applicable for waste water, waste residues, dust, malodorous gases, radioactive substances, noise, vibration, electromagnetic radiation, such as environmental pollution and hazards.)

According to the spirit of the Environmental Protection Act legislation, "intentional intrusion of light" should constitute environmental pollution, because intentional intrusion of light is caused by human activities, it may cause a series of bad effects in environment, such as temperature rises. When the light is too strong to have some negative visual impact, it is certainly to affect people's normal life, so "intentional intrusion of light" and other forms of pollution as an environmental pollutant, shall be taken into consideration and be prevented.