Many of the bacteria in question are genuinely mutualistic with their hosts, helping the process of digestion or warding off pathogenic bugs.

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After a person had a big meal the warm fumes from the process of digestion entered the veins, thence to the brain, and thither to the heart, the seat of consciousness, where their cooling brought about sleep.

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The scientists then discovered that in leukaemic cells, Tenovin is able to interfere with the process of "self-digestion" that leukaemic cells use to protect themselves during periods of stress.

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Harvest Power is currently in the process of building two large anaerobic digestion facilities, one in Richmond, outside Vancouver, Canada and the other in London, Ontario.

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