How can you prevent drunk people from urinate on the streets' walls?
In 2015 Hamburg municipality started an initiative, that have spread since to other cities, of painting walls around bars and near train stations, with Hydrophobic Paint with special texture that splash liquids back
Source:
https://www.theguardian.com/world/2015/nov/27/walls-that-pee-back-people-urinate-in-public
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