What is a key difference between greywater use and water reclamation?

Greywater is wastewater from sources such as sinks, showers, and laundry, kept separate from toilet sewage. When collected separately, it may be suitable for some uses, such as irrigation, without treatment. Water reclamation generally involves treating wastewater before it is reused, so choice A, “If collected separately, greywater can be used for certain applications without treatment,” is the key difference. Reclaimed water is not always safe to drink; its safety depends on its treatment and intended use.

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