Look at the night sky in the city, even if the sky is clear, can see the stars have been less and less, mainly because of the city night bright light caused by light pollution caused. However, scientists have recently found that light pollution will not only bring astronomers trouble, and may even make the global air pollution becomes more and more serious.

    According to a study by the National Oceanic and Atmospheric Administration, a chemical called nitric acid (anion, which is generally referred to as nitrate anion), is constrained and blocked by road lighting that can be disrupted by cars and factories harmful gas.

    A study conducted by the National Oceanic and Atmospheric Administration scientist Harald Stark in Los Angeles shows that light from buildings, street lights and car lights can inhibit nitrate. "Our preliminary findings demonstrate that urban lighting can slow the speed of cleaning at night by 7 percent and increase the initial chemical hazard that causes ozone pollution by 5 percent the next day." Stark said, "We need the next step The more accurate quantification of its impact, that is, how much ozone our city actually actually produced the next day is very important because many cities are close to the limits of the ozone control level, so even if it is so small The reaction may also have a great impact.

    Although the light is much darker than the sun, but still have to adversely affect the adverse effects. To this end, Stark put forward a possible solution, that is, the color of the light to change the smaller red, but this may not be realistic. Stark also has another simpler remedy to change the direction of the light down. The less the light on the ground, the less the effect on the nitrates in the atmosphere. Li Zhongdong