John Scarpulla of the San Francisco Public Utilities Commission explained how the sidewalk landscaping planter works as a tidal flow wetland while he led a tour of the SFPUC Headquarters for the Net Positive Energy and Water Conference attendees. (Photo by Mignon O’Young)
![John Scarpulla of the San Francisco Public Utilities Commission explained how the sidewalk landscaping planter works as a tidal flow wetland while he led a tour of the SFPUC Headquarters for the Net Positive Energy and Water Conference attendees. (Photo by Mignon O’Young)](https://gabreport.com/wp-content/uploads/2014/03/DSC03647.jpg)
John Scarpulla of the San Francisco Public Utilities Commission explained how the sidewalk landscaping planter works as a tidal flow wetland while he led a tour of the SFPUC Headquarters for the Net Positive Energy and Water Conference attendees. (Photo by Mignon O’Young)