Ernest Scheyder is an author and senior correspondent for Reuters. His new book, The War Below: Lithium, Copper, and the Global Battle to Power Our Lives, looks at the impact of the green transition in the US – and, more particularly, the tensions over the increasing need to mine for metals to decarbonise the grid (and power a plethora of devices) against the nation’s desire to conserve the environment. The book illustrates how materials effect geo-politics and the urge for energy securi...