A decade on, the world has largely forgotten about the Chibok girls, who were kidnapped by Nigeria's Boko Haram Islamist militants. But for victims and their families, like Solomon Maina, who is still waiting for news about his daughter, the tragedy is ongoing.

Building solar and wind farms is one thing. Connecting them to the electricity grid is another. How does our electricity network need to change in order to cope with more renewable energies?

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