Coal 'trash' turned into treasured material
By Zhu Lixin in Hefei |
chinadaily.com.cn |
Updated: 2020-12-31 13:25
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A by-product of the coal mining industry, coal gangue has long been a major pollutant. In Huainan, a city of East China's Anhui province that serves as a primary coal production base, coal gangue has been transformed into a valuable and more ecologically friendly material in recent years, thanks to advancements in technology.
