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Humble tofu powering Indonesian homes with clean energy

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TOFU MAKERS GO GREEN: A woman frying tofu. Around 150 small tofu businesses in Kalisari village are benefiting from a pioneering green scheme that converts wastewater from their production floors into a clean-burning biogas.

Kalisari, Indonesia

IN A dark and steamy room in Indonesia's tofu heartland three men sweat over bubbling cauldrons, churning creamy beancurd with wooden paddles before draining it by hand and slicing it into silky cubes.

Tofu has been cooked this way for generations but today,