i want to introduce tonight scott kessler of california breathing, a programs manager for the schools and childcare settings at the california department of public health, and we applied for an award from california breathing to recognize some of the efforts that our buildings and grounds and our maintenance and operations departments have been doing to improve air quality and implement a green cleaning program and reduce pesticides used in school yards and i want to bring up scott kessler to explain what his group thought about our efforts in the past. scott, welcome to san francisco unified. >> thank you, nick. this year, six school districts from across the state distinguished themselves and are recipients of the a.i.r. health awards, achievements in respiratory awards. and san francisco unified is one of those six districts. why is this important? in san francisco, approximately 16.2% of the students have been diagnosed with asthma so in a class of 30, approximately six students have asthma and there's an enormous financial cost. in california each year approximately 1.2 million s