A large mushroom farm near Nairobi is producing mycelium for building materials that end up as fungi-based panels, which are more sustainable and affordable than traditional bricks. MycoTile, the company behind the innovation, combines mycelium — the root part of the mushroom — with natural fibers to create insulation and decor. The approach could help address Nairobi's housing crisis where many live in informal settlements. (AP video by Desmond Tiro)