id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajst-32271	Wang, Yuqi	Effect of PM2.5 on the Incidence of Asthma in Children	2025	8	.pdf	application/pdf	3492	162	51	The second set of data, PM2.5 air pollution concentration, gradually increased with time. Underrepresentation of exposure data: Annual average PM2.5 concentration data may originate from limited ground-based monitoring sites, and for countries with extremely uneven geographical, climatic, and demographic distributions, such as China and India, a national annual average cannot capture the spatial heterogeneity of population exposures and short-term high- concentration exposure events.	cache/ajst-32271.pdf	txt/ajst-32271.txt