environment Effects of PM2.5 and Meteorological Parameters on the Incidence Rates of Chronic Obstructive Pulmonary Disease (COPD) in the Upper Northern Region of Thailand Wichuda Singkam; Nirote Sinnarongp; Kittawit Autchariyapanitkul; Katesuda Sitthisuntikul; Siwatt Pongpiachan* School of Social and Environmental Development, National Institute of Development Administration (NIDA) 18 April 2022