Graphite mining and processing is particularly bad for the environment. In China, one of the world's leading graphite producers, the effects of the so-called "graphite rain" – a silver dust that falls from the skies in areas around the mines – along with the hydrochloric-acid-infused waste water from processing are reportedly rapidly poisoning the environments around the mines. This has led China to slash production, closing a number of mines.
Bloomberg has an excellent piece on the environmental effects of graphite, as well as the impact of China's move on the global price of the material, the latter of which is expected to impact the future pricing of electric vehicles. Hop over to the site and have a look.