(b) 'Even poor ventilation contributes' (paragraph 4). What does poor ventilation contribute to?
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lack of air
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studies by J.N. pande , professor of medicine , all india institution of medical science , new delhi , show how unhealthy cooking methods and the use of biomes fuels not only contribute to respiratory tract infections , including chronic bronchitis in women but also put children below five at grave risk. As he notes , even poor ventilation contributes....
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