On average, over 10 billion gallons of rain falls in San Francisco every year. Add climate change and more extreme weather to the mix combined with the city's antiquated sewer system and you can have flooded streets and backed up drains.Now schools in San Francisco are implementing a creative solution that aims to manage the storm water while benefitting children, their families, and neighborhoods.
'They'll be bringing in specially engineered soil called 'bioretention soil.' That's a mixture of different types of compost materials and sand that allow the storm water to flow thru it really, really quickly,' said Bloom.The rain that falls on the schoolyard as well as the roof will now flow into the gardens.