City Night Light Pollution

Looking at the night sky in the city, even if the sky was clear, could see the stars also have fewer and fewer, this is mainly due to the bright lights of city night light pollution caused. However, scientists recently found that light pollution will not only astronomers trouble, and may even make the world's air pollution has become more and more serious.
According to a study by the U.S. National Oceanic and Atmospheric Administration, a man named nitrate (generally refers to the nitrate anion) of chemical substances will be subject to the restrictions and impediments of the road lighting, the substance that breaks down the emissions from cars and factories harmful gases.Research and testing conducted by the U.S. National Oceanic and Atmospheric Administration scientist Harald Stark in the City of Los Angeles showed that the light would come from buildings, street lights and car lights of nitrate to produce inhibition. "Our preliminary findings show that the city lights at night cleaning speed slows down 7%, and the second day of the starting chemicals cause ozone pollution by 5 percent." Stark said, "We are the next step its impact for more accurate quantification, the second day of our city, in fact how much ozone is very important to carry out this work, because many cities have been close to the limit of the ozone level of control, so even something like this tiny the reaction may also have a significant impact. "
Although the lighting is much more bleak than the sunlight, but will still be difficult to ignore the adverse effects. Stark proposed a possible solution, that is to change the color of the light affect the smaller red, but doing so perhaps not realistic. Stark, there is another more simple remedy lights and direction to down. The less light upward, the smaller the impact of atmospheric nitrate. LI Zhong-dong