Major Sources of oxygen demanding waste in fresh water systems areA. Agricultural run-off B. Food ProcessingC. Ore Mining D. Sewage euentE. Landll sites Choose the correct options from these given below:

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Major Sources of oxygen demanding waste in fresh water systems are<br />A. Agricultural run-off B. Food Processing<br />C. Ore Mining D. Sewage euent<br />E. Landll sites Choose the correct options from these given below: