A new map showing the areas most affected by artificial light pollution was made.
A very comprehensive map, titled Artificial Light Luminance in the Night Sky World, was published this month in Science Advances. The satellite measurement system of the first atlas launched in 2001 was not as advanced as it is today.
Atlas measures the “artificial sky glare” that is reflected in the atmosphere from the electric light of the night on Earth. The glare is caused by light pollution.
Italian scientist Fabio Falchi, head of the Atlas work team, says one third of people can not see the Milky Way galaxy because of light pollution, and the biggest loss is in industrialized areas. 60% of Europeans and 80% of North Americans do not see the Milky Way galaxy at night.
However, the problem with light pollution is not only about seeing the stars. Falchi and his team express that this pollution is also influential on the environment and public health.
Where is the most intense light pollution?
The satellite performs the measurements, walks on poles 800 km from the ground, and takes the photo of the Earth in the night. The location and intensity of the light is determined. Then these metrics are transformed into maps.
If the sky looks bright on the map, it is difficult to see the stars in the night. For example, in Times Square in New York you can see only a few stars in the night sky.
“The country where light pollution is most intense is Singapore.
In the major metropolises of Europe, America and Asia, the light levels in the streets prevent or delay the transition of our body to night order, as it should be at sunset
In developed countries electric light is widely used and this causes a serious change in the environment.
Light pollution is not only a problem of big cities. For example, the light radiating from Las Vegas and Los Angeles also affects the National Park of Death Valley.
People like other living creatures around the world have a body clock and rhythmically arrange this clock in terms of sleep and wake up, hunger, activity, hormone production, body heat, and many other psychological processes. This clock, which performs a cycle of 24 hours correctly, depends on important signals such as daylight, darkness.
Perhaps the light pollution shown is not at a level that affects our body clocks alone and directly. This measurement is made by determining how much of the hormone melatonin is suppressed.
The atlas’s measure of light pollution is based on the atmospheric reflection of the electric light.
The formation of the physiological structure according to the body clock has emerged as a result of an evolution of billions of years. The entrance of people into the life of the 19th century, the spread of the 20th century since the issue. So, this period is a tiny drop in the ocean in terms of evolution.
In recent times, doubts about the fact that the body clock has caused problems such as sleep problems, obesity, diabetes, some cancers and emotional disorders are getting stronger!
In addition, light pollution also leads to ecological problems such as the death of migratory birds and marine mammals.
It is being investigated seriously what kind of lights are more harmful in terms of body clock at what time of day.
According to this, the daylight is a bright light with a high blue content (fluorescent) and a night with a low blue content. It is also advisable to avoid bright blue-screened tablets and smartphones in the evening.
The most important data that will emerge from this research will be the application of least harmful light in street lamps. The fact that street lights in Los Angeles and New York have been completely turned into ‘white’ LED lights is critically criticized. Because this light contains the blue wavelength which causes the most harm to human in terms of body clock rhythm and night physiology.