Japanese town of Hōki uses adult diapers to heat public baths

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Japan's ageing society is forcing it to innovate in some unusual ways. Fifteen years ago, the western town of Hōki, where almost half the residents are aged over 65, started using recycled adult diapers to heat public baths and reduce energy bills. The project was highly successful and now the idea of turning diapers into fuel pellets has spread to other parts of Japan. Our correspondents report.