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Both human and animal wastes are sometimes used as fertilizer. How are the two types treated differently before they are used to fertilize
crops?
O Human waste is used directly; animal waste goes through physical and chemical treatment.
O Human waste is used in solid form, animal waste is used in liquid form
O Human waste goes through physical and chemical treatment, animal waste is used directly.
O Human waste is used in liquid form, animal waste is used in solid form