DODOMA, Aug. 7 -- Surely, in the world of Tanzanian farming and household energy, there is a new superhero in town. And no, it is not solar panels or wind turbines with complicated setups, it is a humble black block called Rafiki Briquettes. Think of it as charcoals smarter, cleaner cousin who went to college and now fights climate change on the weekends.

At the heart of the Nane Nane Agricultural Exhibition in Dodoma, one pavilion in particular has been drawing curious crowds, not with flashy music or dancing mascots, but with something arguably more exciting: clean energy education.

Here, the State Mining Corporation (STAMICO) is making the most of the annual agricultural event to show that mining is not just about pickaxes and hard h...