Analysis on temporal and spatial evolution characteristics of PM<sub>2.5</sub> mass concentration in counties of Shaanxi province from 2000 to 2018

LIU Yu-feng, YUAN Zhi-hua, YANG Jun-jun, GUO Ling-xia, XU Xiao-ting, AN Bing

HUBEI AGRICULTURAL SCIENCES . 2022, (5): 127 -134 . DOI: 10.14088/j.cnki.issn0439-8114.2022.05.023