The study was conducted on Alajo, Ghana Broadcasting Corporation (G.B.C.), Korle-Bu, Osu, and Dzorwulu (Suburbs of Accra) to: (a) Ascertain the presence or absence of protozoa and heavy metals (Cd, Pb, and Zn) in soil and water used for irrigation. (b) Ascertain the presence or absence of protozoa, Cd, Pb, and Zn in lettuce grown with untreated wastewater.
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