id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cord-313825-bbjxd86y	Xia, Tian	Pulmonary diseases induced by ambient ultrafine and engineered nanoparticles in twenty-first century	2016-10-08		.txt	text/plain	8770	369	42	In a recent study, Chen et al. presented findings that implicated long-term exposure to air pollution particles contributed to enormous loss of life expectancy in China These results were based on an experimental design making use of a Chinese policy that provided free coal for heating in cities located north of Huai River, but not in the south, which produced an arbitrary discontinuity for PM air pollution, where the major difference was coal combustion.	cache/cord-313825-bbjxd86y.txt	txt/cord-313825-bbjxd86y.txt
