Hickman, A; Baker, C; Cai, X; Delgado-Saborit, J; Thornes, J (16 January 2018). "Evaluation of air quality at the Birmingham New Street Railway Station". Austen, Kat (7 January 2015). "Environmental science: Pollution patrol". Fan, Zih-Hua Tina (January 2011). "Passive Air Sampling: Advantages, Limitations, and Challenges". Research shows that prevailing winds blew low-hanging air lots of factory emissions (largely SO2) towards the east coast of China.
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