Elsevier, Science of the Total Environment, (497-498), p. 274-281
DOI: 10.1016/j.scitotenv.2014.08.008
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In the fall and winter of 2007 to 2011, 167 24-h quartz filter-based fine particle (PM2.5) samples were collected at a regional background site in the central Pearl River Delta. The PM2.5 showed an annual reduction trend with a rate of 8.58 mu g m(-3) (p