7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 1 Vermi Processing toilet has been tested in India and has been found to be a novel, low water use toilet. This process is simple and hygienic. What is used to treat the human waste in these toilets?

    A) Chemicals                   

    B) Earthworms

    C) Both (a) and (b)          

    D) None of these

    Correct Answer: B

    Solution :

    Earthworms

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