Simply said, water harvesting is the process of gathering rainwater for use by people, plants, and animals. It is also possible to collect other types of water, such as dew and fog.
Grey water is the relatively clean wastewater from household activities like bathing, dishwashing, and laundry. Unlike black water from toilets, grey water can be recycled for uses such as irrigation and toilet flushing. By reusing grey water, we can conserve water, reduce utility bills, and lessen the environmental impact.