In the city looking at the night sky, even if the sky is clear, can see the stars have been less and less, mainly due to urban night bright lights caused by light pollution caused. However, scientists have recently discovered that light pollution will not only bring trouble to astronomers, and may even make the global air pollution is becoming more and more serious.

According to a study by the National Oceanic and Atmospheric Administration, a chemical called nitrate, commonly known as nitrate anions, is constrained and hindered by road lighting, which breaks down emissions from cars and factories. harmful gas.

Research conducted by the US National Oceanic and Atmospheric Administration scientist Harald Starck in Los Angeles has shown that light from buildings, street lights and car lights inhibits nitrate. "Our preliminary results show that city lights can slow down nighttime cleaning by 7% and increase the amount of ozone-contaminated starting chemicals by 5% the next day," said Starker. "We need the next step The impact of which is more accurately quantified, that is, how much ozone actually occurs in our city the next day. This work is important because many cities are close to the limits of ozone control levels, so even small Of the reaction may also have a great impact.

Although the light is much darker than the sun, but still have a difficult to ignore the adverse effects. To this end, Stark proposed a possible solution, that is, the color of the light to the impact of the smaller red, but this may not be realistic. Stark also has another, simpler remedy to change the direction of the light to the downside. Because the less light up, the impact on the atmosphere the smaller the nitrate. LI Zhong-dong