A simple machine can convert human waste to electricity and fertilisers. It is time to rethink how we treat this valuable resource

Ta Quang Nah is a Vietnamese rice farmer, pig breeder, builder and fisherman. But for several months now he has also been running a power station from his home on the Ca Mau peninsula.

All the family’s waste goes straight from their outdoor latrine to join that of their four pigs in an airtight underground chamber, and the methane gas that is naturally let off as the combined excreta decomposes collects in a long polythene bag secured above ground.

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Source: Guardian Environment