More than half the electric cars sold on Earth last year contain zero cobalt, while the phones people use to post about blood cobalt still run on the most cobalt-packed battery chemistry ever made. The "40,000 child slaves" stat traces to a single UNICEF estimate from 2014, which counted children working across all mines in southern DRC, every mineral, twelve years ago. The child labor was real, and Amnesty documented seven-year-olds in the pits in 2016. But the "so we can drive electric cars"…