过去20年的研究证明了PM2.5和一系列不良健康结果之间的联系，包括哮喘、急性支气管炎、肺癌、心脏病和心肺疾病等等。
Research over the past 20 years has tied PM2.5 to a range of adverse health outcomes, including asthma, acute bronchitis, lung cancer, heart attacks, and cardiorespiratory diseases.