These days, fine dust is one of the must serious problems in the world. what is the fine dust? Fine dust can't be seen with humans eyes. It floats in the air for a long time and comes down. Its size isn't over 10㎛ and comes from coal and oil. World Health Organization chose fine dust is one of the most serious problems in the world. If we breathe in this dirty air fora long time our immune system gets weaker. Also we can take a cancer.

What is the difference between fine dust and yellow dust? Yellow dust comes from china almost 100% but, 21% of fine dust is made from our countries. Yellow dust mostly appears in April and May because the wind blows from china to south, but fine dust is presents every month. because many factories and machines give out   co2 every day  

Also fine dust can even kill people. Fine dust is cause cancer if we breathe in. What is the kinds of cancer? There are many cancer. but the well-known cancer is lung cancer. The lung cancer is one of the most cancer. If we get this cancer, we can't find it. so Many people have died this cancer.