Invisible Poison, The Fine Dust

The fine dust is getting worse and worse. This fine dust is currently becoming a huge problem in the world, including South Korea. You can also see it on the news frequently. And even then, the current presidential candidate presidents are making pledges about this matter. From now on, I want to deal with the definition of fine dust, the influence of it, and the causes and solutions. First, what is the dictionary definition of fine dust? Literally, It is a particle of dust that is almost invisi