Cities are using urine-repellent walls that 'pee' right back at you

Public urination has become such a massive issue in some cities that people are resorting to tech for solving the problem in a creative way.

A special liquid-repellent paint has been used to coat walls in San Francisco, after a similar experiment was rolled out in Hamburg, Germany.

This is a tweet that the San Francisco Public Works, a group that aims to enhance the quality of life in the city, posted showing how this works:

The paint used to spray the walls and make them "urine proof" is a superhydrophobic coating that shows some incredible results:

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