For the past few months, journalist Núria Vilà Coma and I have been conducting an investigation into how the energy transition is affecting two African countries: Senegal and Guinea. Guinea is the world's leading producer of bauxite and has the largest reserves of this mineral. Bauxite is first transformed into alumina, and then into aluminum, which allows for a significant increase in value: when it is aluminum, a strong and lightweight material, it is worth thirty times more than bauxite. Because the price is so low—a kilo of bauxite cost between 6 and 8 euro cents last year—Guinea increases its revenue by multiplying its production—it now produces ten times more than it did thirty years ago.