it's something that i really advocate for and our caution to use zero tolerance and exclusionary discipline policies and also i teach teachers at san jose state and hundred students who are future teachers. >> can they do a projector? >> no. my teacher did, but again using social media, integrating all of the areas is so important for the prevention. thank you for that focus too and i think that gentleman has comments. >> i was going to follow up in the conversation with digital media or literacy needed within the educational system. we are still experiencing digital divide and access and just the one you speak of recently officer when you mention the generations and investigators

not engaged with this media and no don't know my book or face space and when you have to look at youth culture. we talk about texting and sexing and omg and i didn't text anything to you. i spoke to and part of the language and how they engage so until we look at the culture of young people and how do we impact today's 20th century media culture we can't make a huge impact in regards to bullying or electronic aggression or whatever name we want to place on it and is affecting the students and i am excited you're addressing this issue and it's a crucial time for this generation and if we don't take serious this conversation today and action tomorrow we will see more and more issues arise. [applause] >> and i'm going to cap it up and i totally agree with that

and one of the resources i want you to point is out is the family institute on line and platform for good a couple days ago. anne was there for the launch in dc and the goal of this whole thing is connect parents, educators and teens together to talk about both the eat your peas and how you stay a digital citizen and do the whole thing and i encourage everybody to check that out and i think that's the type of resource that will get us to where we need to go. it's called a "platform for good .org" and part of the family institute. >> yay. i think that's the way to cap it off really. let's lose the fear. let's bring --

it's safety, risk prevention, online risk prevention, whatever you want to call is is not the goal. it's important but not the goal. it's the mean to the end and the end is full safe effective successful engagement in participatory media and culture and society. this is a participatory medium that we're talking about in a network world. we're are in this environment and network participatory environment and our students need the tools. they need social emotional learning is a key tool and technical and literacy and media is behavioral so this has just been a fantastic day. thanks to all for coming and thank you everybody. i just want to share one piece of data which i don't

understand completely. maybe our friend from facebook can explain, his twitter colleagues what they do. a hash tag was created and "stop bullying sf barb and hash tag and generated 3 million personal impressions and 1.3 million followers within the last 24 hours. [applause] isn't that incredible? we talked about some of the dangers in social media today and i guess that's part of the beauty of social media and the video is part of that as well, so on behalf of all the childrens and families and parents and communities in the district i want to thank everybody for coming for all the work that you do. i feel optimistic in all

of work that you do. thank you and go forth and do great work. >> this lodge is home to some of the best fly casting pools in the world. these shallow concrete pools

don't have fish. this is just a place where people come to practice their fly casting technique. ith was built in the 1930's and ever since, people have been coming here to get back to nature. every year, the world championship of fly casting is held in san francisco and visitors from all over the globe travel to be here. >> we are here with phil, general manage of san francisco rec and parks department at the anglers lodge. what do you think about this? >> it is spectacular, travis from oregon, taught me a snake roll and a space cast. >> there are people from all over the world come to san francisco and say this is the place to be. >> yeah. it's amazing, we have teams from all over the world here today and they are thrilled.

>> i flew from ireland to be here. and been practicing since for the competition. all the best casters in the world come here. my fellow countryman came in first place and james is on the current team and he is the head man. >> it's unique. will not see anything like it where you go to compete in the world. competitions in ireland, scotland, norway, japan, russia each year, the facilities here in the park are second to none. there is no complex in the world that can touch it. >> i'm here with bob, and he has kindly agreed to tell me everything i need to know about casting. i'm going to suit up and next, we're in the water. >> what any gentleman should do. golden gate angling has free

lessons the second saturday of every month. we have equipment show up on the 9:30 on the second saturday of every month and we'll teach them to fly cast. >> ok. we are in the water. >> let me acquaint you with the fly rod. >> nice to meet you. >> this is the lower grip and the upper grip. this is a reel and a fly line. we are going to use the flex of this rod to fling away. exactly as you moved your hands. >> that's it? >> that's it. >> i'm a natural. >> push both arms forward and snap the lower hand into your tummy. push forward. >> i did gave it a try and had great time but i might need some more practice. i met someone else with real fly casting skills.

her name is donna and she is an international fly casting champion. >> i have competed in the casting ponds in golden gate park in san francisco. i have been to japan and norway for fly casting competition. i spend my weekends here at the club and at the casting pond. it's a great place to learn and have fun. on a season day like this, it was the perfect spot to be. i find fly casting very relaxing and also at the same time very challenging sport. takes me out into the nature. almost like drawing art in the air. and then i can make these beautiful loops out there. >> even though people from across the globe come here to compete, it's still a place where locals in the know relax

and enjoy some rely unique scenery. until next time, get out and play! because we have a great waste water system here in san francisco, we do about 80 million gallons of waste water here in san francisco, which means we basically fill up 120 olympic sized swimming pools each and every day here in the city. we protect public health and safety and environment because

we are discharging into the bay and into the ocean. this is essentially the first treatment here at our waste water treatment facility. what we do is slow down the water so that things either settle to the bottom or float to the top. you see we have a nice selection of things floating around there, things from bubble gum wrappers, toilet paper, whatever you dump down the toilet, whatever gets into our storm drains, that's what gets into our waste water treatment and we have to clean. >> see these chains here, this keeps scum from building up. >> on this end in the liquid end basically we're just trying to produce a good water product that doesn't negatively impact the receiving water so that we have recreation and no bad impact on fish and aquatic life.

solids is what's happening. . >> by sludge, what exactly do you mean? is that the actual technical term? . >> it's a technical term and it's used in a lot of different ways, but this is organic sewage sludge. basically what it is is, oh, maybe things that come out of your garbage disposal, things that are fecal in nature. it's sludge left in the water after the primary treatment, then we blend those two over and send them over to digestion. this building is built to replace tanks here that were so odoriferous they would curl your hair. we built this as an interim process. >> is there a coagulant

introduced somewhere in the middle of this? . >> this coagulant brings solids together and lets the water run through. that gives us more time in the digestion process, more time to reduce the amount of solids. these are the biggest ones in the world, like we always like to do in san francisco. they are 4 meter, there's none like it in the world. >> really? wow. >> three meters, usually. we got the biggest, if not the best. so here we are. look at that baby hum. river of sludge. >> one of the things is we use bacteria that's common in our own guts to create this reduction. it's like an extra digestion. one of the things we have to do to facilitate that is heat that sludge up and keep it at the temperature our body likes, 98.6 degrees. >> so what we have here is the

heat exchanger for digester no. 6. these clog up with debris and we're coming in to -- next wet weather season so we always come through here, clean them out, make sure that we get maximum heat exchange during the colder wet weather. sludge season. >> rubber glove. >> right here. >> rubber glove, excellent. all right, guys. >> thank you. >> good luck. >> this is the full on hazmat. . >> residual liquid. we're taking it time to let it drain. we don't want to get sludge on it necessarily. take your time. stand on the side of it.

. >> should we let it release for a while? . >> let it release. >> is that the technical term? . >> this is the most important bolt on the whole thing. this is the locking bolt. it locks this thing right in place. so now. >> take your hammer and what we want to do, we get rag build up right in here. the hot water recirculates right in here, the sludge recirculates in here. the sludge sometimes has rags in it. all we want to do is go around the clean the rags. let me show you how. take the slide hammer, go all the way through the back, go around. >> got you. >> during the real rainy season, how does that change the way dealing with this job? is it a lot more stuff in there?

. >> what we do, charles, we do this quarterly. every four months we go around and clean all the heat exchangers so we don't have a large build up. . >> go around? . >> yeah. (sound of hammering). >> what i'm trying to do, charles, is always pull it out on the low stroke. >> right. so you are not, like, flying out. now talk about clean up.

. >> then where does this stuff get deposited? . >> we're going to dump it in a debris box and it will go back to the plant. >> if you think back, the romans came up with a system of plumbing that allowed us it use water to transport waste away from the hub of civilization, which enabled cities to grow. . >> you have a large bowl, a drive motor and another motor with a planetary gearbox with differential pressure inside there. the large mass up there spinning separating the solids from the liquid. we have to prevent about once a month, we go in there grease those, change the oil, check the vibration levels. the operators can tell just by

the hum of that machine that it's a harmonic noise emitted that it's out of balance and the machine needs to be cleaned. it will start vibrating and we have vibration analysis machines that will come over here and check the levels. so it's kind of an on-going thing that you have to stay on top of on a daily basis. >> handled properly, you take organic residuals, as we call them, that are leftovers of our society and turn them back into some energy. and we have another ability to take that sludge and get a nutrient value for crops there. we actually are running a kind of composting energy recovery system. >> well, this is a dirty job. we try to do it safely and we try to do it without imposing too much on the public. people want to flush their

toilets and have things go away and not be bothersome again. we do a lot to try to accomplish that. i'd like to invite you to come back any time you want. once you got this in your blood, you are not going to be able to stay away. the raging waters are fun and when we do digester cleaning i really hope you can come back. that's quite a sight. >> yeah, that sounds interesting. >> i really appreciate you coming by and it was a