| http://www.w3.org/ns/prov#value | - Its grey water (water that comes from sinks and showers, not toilets) that has been processed and is used everywhere to water the plants and clean the roads.And yes, it is particularly important to wash sidewalks in a sandy country otherwise they will be full of dust and sand, leading to an increase in eye allergies, asthma and other medical conditions in people.
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