Q41. Which of the following is a biological treatment method?
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Q42. Fluoride toxicity can lead to:
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Q43. Which compound is a major greenhouse gas emitted from landfill sites?
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Q44. Which is an example of point source pollution?
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Q45. The main objective of effluent treatment is:
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Q46. Which is not a method for odor control in waste treatment?
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Q47. A common by-product of wastewater anaerobic digestion is:
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Q48. The chemostat principle is used in:
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