San Francisco's public works agency says the city has begun testing urine-repellant paint in areas where people are prone to public peeing. The paint, according to a spokeswoman, will cause the urine to "bounce back" at the urinator. 

The high-tech paint is called Ultra-Ever Dry, and it comprises a thin barrier of air on surfaces that will "repel almost any liquid." As of now, the city has painted nine walls in an area with a large homeless population. 

"The idea is they will think twice next time about urinating in public," said spokesperson Rachel Gordon. She said more public toilets are planned across the city as well. 


 facts about homelessness:

 California has the highest number of unsheltered homeless people living within its borders. On one night in 2013, it accounted for 29% of the country's homeless individuals, 111,732 total.

 In the '90s, the city closed many of its public bathrooms due to drug use and prostitution.

 In the early 1970s, Ronald Regan, then the Governor of California, aided in the deinstitutionalization of many of the state's mentally ill people. Many of these people are still homeless and living in San Francisco.

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