China is releasing metal from state stockpiles as part of its campaign to restrain prices after factory inflation in May hit its highest level in 13 years.
London-based consultancy Minviro says the true climate change impacts of producing battery-grade graphite can be as much as 10 times higher than published values.
Details captured in European Space Agency satellite data show the plume about 90 kilometers (56 miles) east of Shanxi’s capital Taiyuan, in Yangquan City.