How rainwater harvesting is useful at the time of water scarcity?
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It provides water when a drought occurs, can help mitigate flooding of low-lying areas, and reduces demand on wells which may enable groundwater levels to be sustained. It also helps in the availability of potable water, as rainwater is substantially free of salinity and other salts.
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because it helps in conserving water for some uses as watering plants, washing car, etc
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