Wind direction likely coming to study the distribution of PM in the air and the method of Regression Analysis to relate found that PM has no relation to chronic obstructive pulmonary disease.
Wind direction led to the trend of the distribution of PM in the air and how to determine the relationship Regression Analysis showed that PM has no relationship to disease, COPD.
The wind direction to study the trend of the distribution of PM in the air and use method Regression Analysis to find the relations found no relationship with the occurrence PM chronic obstructive pulmonary disease.