this particular ordinance i'd like to dedicate to tessie esther who is battling -- trying to hold on to stay with us. this, this particular ordinance will require contractors to use the cleanest possible technology and leverage our purchasing power as a city to ensure that public construction projects are reducing diesel emissions and other particulates that can compromise public health. now, the second, the second ordinance updates the city's landmark article 38 of the health code to require developers who are retrofitting or building new housing in air quality hot spot zones to install ventilation systems to ensure residents receive clean air in this units. this will streamline the process for project sponsors by clearly identifying the airs az of the city where we know these enhanced measures are needed most. this legislation is also part of an overall strategy to keep residents of the city and particularly those who suffer disproportionately from a wide range of environmental issues, healthy. as supervisor i have been focused on the health impacts of poverty, of violence, of land