Skip to main content

tv   Click - Short Edition  BBC News  November 13, 2021 3:30am-3:46am GMT

3:30 am
this is bbc news. the headlines: as the un climate summit in glasgow runs into extra time, delegates are considering a third draft of an agreement to try to put a limit on global warming. the conference president, alok sharma, has called for a final injection of "can—do spirit". an ally of former president trump, steve bannon, has been indicted by a federal grand jury, charged with two counts of contempt of congress. mr bannon refused to give a deposition or supply documents to the committee investigating the attack on the us capitol last january. more than a thousand migrants are spending what for many is a fifth night trapped at the border between belarus and poland amid a continuing stand—off between the two countries. us presidentjoe biden has expressed his concern about the situation on the border.
3:31 am
hundreds of teachers have been targeted in recent weeks by pupils who've anonymously made abusive videos on the social media platform tiktok. some teachers have been accused of being paedophiles or subjected to homophobic comments. schools are now calling on tiktok to take urgent action to remove what they say is disgraceful abuse of teachers online. tiktok says it is deploying additional measures to detect and remove offensive content and regrets upset caused to teachers. but teaching unions say it's not being done fast enough. our education correspondent elaine dunkley has more. tiktok, a social media platform where people can create and share funny and quirky content, but there is a darker side to one of the latest trends. targeting teachers with abusive and offensive videos. this one shows tom rogers,
3:32 am
history teacher, posted from an anonymous account and viewed thousands of times. there were two videos using a derogatory term to describe someone who was inappropriate towards children. you are thinking when you go in there that kids are laughing at you and whatever and everyone�*s seen it, so i have messaged tiktok, didn't get a reply, the videos are still there. there could be something tragic happen, and it's only then that something will have to be done. we had a number of staff who have been impacted by this and who are off currently. many schools across the uk have sent letters to parents warning them about schoolchildren creating and sharing videos targeting teachers. seen by, in one case, 2 million viewers... at the ellesmere port church of england college there have been a number of incidents. we are working with a number of staff at the moment who are finding it difficult to cope. we know that the children who have posted the videos, we're working with their families to make sure they understand what they've done wrong.
3:33 am
bodies like tiktok must make sure that they can police this a bit better. you can take three separate resistors... these sixth formers say everyone in school has a responsibility to stop online bullying. when i first saw them, my first response was to report it. report it as, like, bullying and harassment. some of the videos you see are just literal attacks on one individual. i know one teacher- has been affected the most. i haven't seen him - around school since then. in a statement, tiktok says its community guidelines make clear that it doesn't tolerate content that contains bullying or harassment. statements targeting an individual or hateful speech or behaviour, and will remove content that violates these guidelines. but teaching unions say videos are not being taken down quickly enough. tiktok is living in a parallel universe, frankly. they are not taking this issue seriously, they're not giving a sense of urgency,
3:34 am
and they're definitely not recognising that they should be taking responsibility to help us adults educate young people about how you conduct yourself responsibly on social media. what can schools do about this? when tom's not teaching, he hosts a weekly show on teachers talk radio. you've got school websites, and we've got all our photographs online... but teachers say they don't just want words, they want action from social media sites like tiktok. elaine dunkley, bbc news. coming up in around 10 minutes�* time, we'll have newswatch. but first, here's click. the world's population continuing to rise and across the globe,
3:35 am
more housing is needed. but these buildings themselves come with their own environmental cost. of course, building and running offices and homes contributes massively to our carbon footprint — more than 13 billion tons of c02 a year. that's nearly 40% of the world's total carbon emissions. so how about making buildings that are part of the solution, not the problem? maybe it's time to rethink renewable energy, the construction materials that we use, and what happens to them at the end of their life. and later, we'll see how demolished buildings can be sorted and salvaged using what's in here. drum roll, please. all the rubbish is being tossed around and eventually, the smaller items will make it through one of these tiny holes.
3:36 am
just wait till you see what's waiting for them down the line. but first, to swansea university's active building centre. instead of pulling its power from the grid, this place powers itself using the latest innovation in solar energy. the conventional box—shaped solar panels that we've been seeing on rooftops for years were just the beginning. now, newer, flexible cells are starting to cover roofs across the world. not that you'd necessarily notice they're solar panels. this feels just like a bit of protective flooring rolled up. but when i unroll this, take a look at that — a solar panel that is that bendable compared to the traditional looking ones there! they are slightly less efficient, but the fact that you can cover a whole roof area with them is one of their advantages. and they work very well in low light conditions, so they're ideally suited
3:37 am
for use in the uk — in the northern hemisphere, really. part of the electricity generated here also comes from these vertical panels encased in tubing, which produce thermal and solar energy at the same time. on average, one wall could provide enough power per day to boil 38 kettles. that's a lot of tea! but what could truly revolutionise solar energy next is in the labs. i'm ready! this is a solar cell, and it's printed? wow! the idea that we're looking at is making these new materials to put on all of the outsides of buildings. there are also semitransparent versions of these that you can put onto glass for the windows. it reminds me of old negatives. yeah, it's actually very similar to photographic film or film that you'd make a movie with. it's just got a conducting layer on it so that you can collect the solar energy, the electricity that the solar cell is making. but what does this mean for buildings?
3:38 am
well, over in a larger clean room, this is happening. it's the same sort of kit as you would print a t—shirt with, but it's bigger! right? the sample goes under it, the ink comes on there and it'sjust dragged across, so it literallyjust prints straight onto the glass. this allows the structure of buildings to change, as they don't need to withstand heavy building materials, and can also be put on curved roofing. you don't put the solar cell on top of a roof, you make the roof into a solar cell. the efficiency is very likely to be in the same order initially as the flexible ones we showed you, but the cost is likely to be dramatically lower. if you want to know, over the next couple months i'm going to india, ethiopia and antarctica. huge journeys around the world
3:39 am
but i would say they're justified because we have to report this crucial subject. it won't drive the car necessarily as soon as it is plugged in. it will use the solar when it can use low carbon electricity from the grid. carbon electricity from the rid. . ., , , carbon electricity from the rid. . .,, , ., grid. having the ability to release solar _ grid. having the ability to release solar energy - grid. having the ability to - release solar energy wherever and whenever it is needed means that here, the officers, the university and the electric vehicles can share, creating a solar powered community. in many parts of the world where there are no grid connections or the grid connection is weak, rural communities can have
3:40 am
power, say, at a school, and then share that power around with the local houses so that they can have an immunity that they can have an immunity that they can have an immunity that they can do educational things in, but they can also have power, particularly at night time, which is very important for safety. time, which is very important for safety-— time, which is very important for safe . ~ . , ., for safety. we are seeing more and more _ for safety. we are seeing more and more possibilities - for safety. we are seeing more and more possibilities of- for safety. we are seeing more and more possibilities of how l and more possibilities of how solar can power. the next challenge, though, is how we get more of these infrastructures in place. we know that constructing buildings uses resources. but when they're demolished, many precious materials also go to waste. it's a problem that recycling sites like as this one in finland are trying to solve. construction and demolition waste is usually crushed and most of it will be burned
3:41 am
in incineration plants to energy. here, we try to do the opposite — we mechanically handle material to produce raw materials that can be reused again. this is one of those places that is frighteningly industrial and frighteningly massive. what happens is the waste arrives in lorries at the far end and then the commercial and the industrial waste gets sorted along these conveyor belt and machines here and construction and demolition waste gets moved along this side here and it is all a very big deal. but to avoid just crushing and burning everything, debris has to be separated into different materials and different sizes that can be recycled individually. and that's where the fun begins. once we get rid of the small stuff, we have the medium
3:42 am
and the large size. and that's what we feed to the robots. no, this is not a warehouse disco. these are sorting lines where an ai brain commands robotic arms to pick out metal, wood and stone and hurl them into their respective bins. it's fast, furious and continuous. i have to say, these things are moving like lightning. they're not getting everything, they're missing quite a bit, but that's because they're still training these robots and calibrating the system for this type ofjunk. in waste sorting, the first problem is that no—one really knows what's on the belts. if you are welding cars, then obviously the next car will come on the conveyor in 5.04 seconds
3:43 am
and there's never really anything unexpected. for these robots, they need to be smart in order to survive the surprises. wow. it's just flinging stuff around! with all sorts rolling towards them, the robots visually track the items with sensors beneath the belt and lasers scanning shapes and sizes, helping to decide what each is made of, how much it weighs and how much it's worth. it sees not only the wavelengths that humanoids see, they also see infrared and they also sense metals. so we basically show the robot that here's a bunch of rocks and here's a bunch of bricks, here's a bunch of high—quality wood. based on that training, the robot then learns. but knowing what to grab is just part of the problem. there are hundreds
3:44 am
of billions of ways how to position the gripper on the belt. the robot needs to have, basically, a second opinion of whether the attempt was successful or not, something that the robot learns fairly easily. today, 80 arms are working around the world, including smaller, faster ones with vacuum grippers, which are better for light items like plastics and tin cans. all in all, these robot arms are rougher and tougher than human workers and, obviously, it's much safer as well. and despite their different skills, each robot feeds back into one shared system. the more we have robot arms in the world, then we have basically one family of robots that learn and then all of the arms that we have around the world get smarter. of course, there will always be some materials that can't be used again,
3:45 am
but robots like these can help recycling plants to recover more and more and save stuff from incineration. and closing this loop means buildings can become much more sustainable — both at the start and the end of their lives. wow! that is it for the short version of our programme. in the meantime, you can keep up with the team on social media. find is on youtube, instagram, facebook, and twitter @bbcclick. and we will be back next week. thanks for watching. bye— bye.

31 Views

info Stream Only

Uploaded by TV Archive on