China’s surface water quality improves

MA Ting and ZHOU Chenghu from the CAS Institute of Geographic Sciences and Natural Resources Research have analyzed COD and nitrogen pollution across surface waters in China during a 15 year period. They conclude that concentrations of these two pollution parameters declined at the national level by 63 and 78%, respectively, during this period.

https://advances.sciencemag.org/content/6/1/eaau3798

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