摘要：通过对2014年大气PM2.5监测数据，分析了辽阳市大气中PM2.5的变化情况。结果表明，近年来PM2.5浓度显著上升是由于燃煤污染物排放、气象条件不利、机动车辆增加以及城区扬尘未得到有效治理等原因所致，并据此提出了减少污染物排放、优化产业布局、调整能源结构、提高监管执法力度等防治对策。

    关键词：辽阳市；PM2.5；污染来源；防治对策

    Abstract：Based on the monitoring data of PM2.5 in 2014， the changes of PM2.5 in atmospheric environment were analyzed in Liaoyang. The results indicated that the content of PM2.5 increased significantly because of the increase of pollutants from coal combustion and motor vehicles ......