In recent years

the fog-haze was appeared in many large and medium cities in our country caused by atmospheric particulate matter

take PM2.5 as representative

became a major issue of public concern. Taking Yichun city as an example

the causes of fog-haze were analyzed in the last three years

including dry and rainless

car exhaust and a lot of firecrackers and fireworks and so on. The countermeasures and suggestions were put forward through the analysis.