| 41. | Systems for purifying drinking water and processing sewage do not work.
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| 42. | A network of channels suggest the settlement had a sewage system.
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| 43. | Raw sewage flows down a dirt canal past his front door.
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| 44. | The bomb was hidden in a sewage drain, Shah said.
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| 45. | The smell of sewage permeated the air after sewer lines broke.
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| 46. | The flies are thick, feasting on the garbage and sewage.
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| 47. | They also accused the military of damaging sewage and water pipes.
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| 48. | NASA's bioreactor is an extremely advanced biological sewage system.
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| 49. | It can turn sewage into air and water through microbial action.
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| 50. | Human sewage sludge can be used as fertilizer to grow soybeans.
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