Regarding the sparks that we observe, I observe this phenomenon often and asked myself the question - whether only I see it or other people can observe this effect. As a result, I conducted a small experiment, I noticed that if you look at the light of the sun at a certain angle without focusing your vision on specific objects, then this splash can be seen with an empirical sequence. As a result, I suggested that people who are not familiar with the phenomenon do the same. The result showed that they also see it. I may be wrong, but this is similar to the 3D phenomenon, I'm leaning towards metal microparticles in the atmosphere from chemical pipelines.