"Dirty Energy"

The clean energy revolution hinges on The Democratic Republic of Congo where conflict, corruptio and child labour are rife....CNN travelled to Lualaba province to track the cobalt supply chain, from small-scale miners to the world's biggest electronics and electric vehicle brands...Before we arrived, local mining officials cleared a group of children from the lake. We could see them clambering up a hillside sacks of cobalt in hand...

CNN asked Apple, Microsoft, General Motors, Tesla, Samsung, BMW, Daimler, Renault, Chrysler and Volkswagen to reveal their suppliers - as per OECD guidelines...While all the companies have a zero-tolerance policy on the use of child labour, many...say they are unable to fully map their supply chain due to its "complex nature".