Suwarti, 44, apparently never gets bored of cooking corn in her kitchen. That is where this corn seller, who lives in Nguken village, Bojonegoro regency, East Java, spends most of her day. She starts at three in the morning and only stops in the afternoon. If there are many orders, she goes into the evening.

Her stoves always need energy. But Suwarti does not seem to fuss about it. She never spends any money on fuel. The blue flames burning from h