Which of the following is FALSE regarding water treatment?   Settling of floc during sedimentation is always a chemical process.   Algae removal from water can be done using aeration.   Disinfection is carried out using radiation or chemical agents.   The addition of activated carbon as filter media is done to remove odorous organic compounds.

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Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.