In 2010, Professor Zhang Meiyun, from the Shaanxi University of Science and Technology, and collaborators proposed to the government that coal fly ash could be used as a filler in paper. Photo: Handout

Topic |   China science
In 2010, Professor Zhang Meiyun, from the Shaanxi University of Science and Technology, and collaborators proposed to the government that coal fly ash could be used as a filler in paper. Photo: Handout
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