Chinese farmer unleashes 300 million hungry cockroaches to eat food waste

Cockroaches are seen as pests, but they can be useful in disposing of food waste. - AFP

Li Yanrong’s farm in Zhangqiu district in Jinan, Henan province, houses 300 million American cockroaches that together munch through about 15 tonnes of food waste a day, or about a quarter of the district’s kitchen scraps.