i'm thrilled autonomy are you going to hear today from our own colleague bob hadden who runs the program for the department of the environment but in the bayer quality district if we are ever going to reduce green house gas emissions we're going to have to get people out of their cards it's going to take carrots you you understand what i mean >> and so as i was getting briefed on this i realized the program is at a crossroads but time to come before you and let you know what a goes on you're going to hear there was changed at the state a law passed at the state that engaged the air district that influenced our program it complicated and i thought it was you're aware of that it is going to change our program. >> bob. >> it's a pleasure to be here i'm joined by dave bickering with the air quality district i'll have him join me we've spoken before about the san francisco's commuter benefits we've given you yugd our representative is not here we're joined if we have questions sue at&t synson will answer those. but i wanted to give you a quick recap of the san francisco ordinance how it works