mr. acosta if there's anyone else that would like to speak, we're going to close public comment right after this. >> i commend you for taking the time to put this resolution and this ordinance. now, while one gentleman said he was against it, our good friend, ernestine weiss, was in shock somebody could say something like that. but that's what happens in san francisco, we allow people to express themselves. that's their prerogative. but to the young people here, and that's the way to do it. we have to leave a legacy that our young people fight what is right and do what it takes to make this universe a better place. in this city we have an ordinance called a precautionary principle. you know about it. basically what a precautionary principle says that we have to protect all life. and if there are any adverse impacts that they be in many of the things that have been stated here contamination, pollution, then we have to stop and reflect. and you know, supervisor, that we have ordinances that prohibit smoking at bus stops. but we have no signs. that's the least we can do, we should put signs th