<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Liu, Shigan</style></author><author><style face="normal" font="default" size="100%">Geng, Guannan</style></author><author><style face="normal" font="default" size="100%">Xiao, Qingyang</style></author><author><style face="normal" font="default" size="100%">Zheng, Yixuan</style></author><author><style face="normal" font="default" size="100%">Liu, Xiaodong</style></author><author><style face="normal" font="default" size="100%">Jing Cheng</style></author><author><style face="normal" font="default" size="100%">Qiang Zhang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Tracking daily concentrations of PM2. 5 chemical composition in China since 2000</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Science &amp;amp;amp; Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2022</style></year></dates><number><style face="normal" font="default" size="100%">22</style></number><volume><style face="normal" font="default" size="100%">56</style></volume><pages><style face="normal" font="default" size="100%">16517-16527</style></pages><isbn><style face="normal" font="default" size="100%">0013-936X</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language></record></records></xml>