while it is a very important and sent -- incentor, not every business thinks it is. we estimate that over 250 clean tech businesses in san francisco with approximately 20 taking advantage of the targeted tax breaks. we believe the tax proposal is also sound land use policy. promotes the concentration of of women in an urban core that has outstanding transit and promotes development and revitalization of a struggling neighborhood. we also believe we have heard concerns around displacement. we move that there are extraordinary other policies within the city that prevent displacement with in these neighborhoods. over 45% of the city's permanent affordable housing is located either in or adjacent to this -- to the boundaries of the central market and tenderloin payroll tax exemption. there is the sro payroll ordinance. the land use ordinance in effect provides multiple opportunities for the city to review conditional use permits, a plethora of development projects, including demolition, rehab, replacement of formula retail, creation of residential dwelling, and all searc