In the context of human infectious diseases, Vibrio cholerae belongs to which major group of microorganisms?

With reference to the "Grit and Sand Removal Tank", consider the following statements: 1. It is a treatment step that typically follows the bar screens. 2. It relies on the principle of significantly increasing water speed to prevent sand from settling. Which of the statements given above is/are correct?

What is the primary environmental consequence of discharging untreated sewage into river systems?

With reference to the "Swachh Bharat" mission, consider the following statements: 1. It was initiated in the year 2016. 2. It focuses on proper sewage disposal and providing toilets for everyone. 3. It strictly prohibits the use of vermi-processing toilets. Which of the statements given above is/are correct?

Considering low-cost sanitation systems based on biological processing, the principal by-product of vermi-processing toilets is:

Consider the following statements about the "Clarified Water" in a treatment plant: 1. It is the water obtained immediately after passing through bar screens. 2. It is water from which solids have settled and floatable impurities have been skimmed off. 3. It may still contain suspended impurities and requires further treatment. Which of the statements given above is/are correct?