this is bbc world news, the headlines... after dramatic scenes in the us house of representatives, the republican kevin mccarthy is finally elected speaker. it took 15 rounds of voting for mr mccarthy to win the job, despite his party having a majority in the chamber. the uk's prime pinister is holding talks with health officials in an attempt tackle the ongoing challenges facing the nhs. a six—year—old boy has shot and injured his school teacher in the us state of virginia. it is unclear how the child obtained the gun, but the police said the incident was not "an accidental shooting'. president zelensky welcomes the announcment of us military vehicles, as putin's unilateral ceasfire appears to have had little effect on the frontline. iran hangs two men

for allegedly killing a security official during anti—government protests. you're watching bbc news. now it's time for click. we will find out if hydrogen can do the heavy we will find out if hydrogen can do the heavy lifting we will find out if hydrogen can do the heavy lifting and we will find out if hydrogen can do the heavy lifting and check we will find out if hydrogen can do the heavy lifting and check out we will find out if hydrogen can do the heavy lifting and check out our latest merchandise. if you do not like the band, the logo comes back.

once again, the leaders of the world have been coming together in an effort to fight climate change. figs effort to fight climate change. sis cop27 effort to fight climate change. is cop27 comes to a close, campaigners are warning that key commitments aimed at securing the future of the planet are at risk. in the year since cop26 happened here in glasgow, there has been a lot of criticism that the event was all talk and not much action. change is not auoin talk and not much action. change is not going to — talk and not much action. change is not going to come _ talk and not much action. change is not going to come from _ talk and not much action. change is not going to come from inside - talk and not much action. change is. not going to come from inside there, that is_ not going to come from inside there, that is not— not going to come from inside there, that is not leadership. this not going to come from inside there, that is not leadership.— that is not leadership. this is leadership- _ that is not leadership. this is leadership. these _ that is not leadership. this is leadership. these summits l that is not leadership. this is - leadership. these summits bring together thousands of delegates from governments, science and pressure groups from around the world. the aim is to provide the support for all countries to be able to reduce their carbon emissions and deal with anyissues their carbon emissions and deal with any issues that climate change will inevitably cause. the world is warming because it emissions produced by burning fossil fuels like oil, gas and coal.—

like oil, gas and coal. global tempers _ like oil, gas and coal. global tempers are _ like oil, gas and coal. global tempers are heading - like oil, gas and coal. global| tempers are heading towards like oil, gas and coal. global- tempers are heading towards 1.5 celsius above preindustrial levels and if they go to 1.8 celsius, scientists warned that half the world cosmic population could be exposed to life—threatening heat and humidity. climate scientists have warned that change needs to come from the top, from governments and companies. but science and innovation will play an important part. yeah. so this week, we're going to look at some of the latest green ideas. and first off, take a deep breath. deep inhalation and exhale. if you live in the green, it's easy to forget what life is like in the grey. the air literally can smell sweeter, and it's definitely cleaner. the world health organization says air pollution poses a major threat to health and climate, and it kills an estimated seven million people worldwide every year. now, we're not all going to move back to nature but what if we could bring

nature into the cities? just outside berlin, this company is trying to freshen up our urban air. this is a biofilter which is sucking air in through the bottom and pumping it back out through this wall of moss. to illustrate that, we've got a smoke machine from the local discotheque. and if i just show you... there you go. it's going in through the bottom and out through the moss. and what happens to the air as it comes back out through the moss is where the magic happens. moss eats pollution. it sticks to its tiny leaves. it's absorbed, digested, and then is turned into more moss. so, as fans draw dirty air in, the bad stuff is left on the moss' leaves, leaving cleaner air to flow back out. the idea of using moss' natural filtering properties came

to the founder after he went for a jog. so, i was in shanghai and i did a lot of exercise outdoors to get back in shape, so go out for runs. and after i think two or three months, i started to have difficulties breathing and that's when i thought maybe i caught the flu, maybe i caught the cold, and it kept on lasting until the point i really left china, left shanghai and went went back to germany. and only after i came back, i realised, "hey, there's definitely a connection to the air quality in china and my personal health". that's when it clicked and i realised i have to do something about the air quality in cities. for the past eight years, green city solutions have been growing moss up to 15 times faster than in nature. each moss mat takes just under 12 weeks to grow. and i have to say, there's something very soothing about being in their greenhouse. do you just come in here and stroke the moss?

when i'm stressed. laughter. ..cool about moss is that this plant doesn't have roots, so they can capture all nutrients through the walls, leaves or leaves' surface. so, you can imagine, like the normal plants, it takes the nutrients from the earth, but it's moss. it can capture everything. the second thing is, like, every plant's moss can absorb co2 because it needs for photosynthesis, for the energy. but the benefit is the density of the moss is pretty high, so we need this higher leaf—surface ratio to capture as much as possible. so now, we are going to take a sample. you? i can do it? for sure. let's tweeze some moss. got some. perfect. now we can have a look under the microscope. there we go. and it's in the lab where we'll get to see moss�*s super power. the plant acts a lot like a human lung, whose high surface area can absorb a lot

of the air in one go. and just like the lungs of a smoker, which end up getting blackened by tar, moss could act like the lungs of a city, eventually being covered in the stuff that we don't want to breathe. so, this is from our one active products. and the black — the black bits are the... exactly. this is the fine dust or particles from polluted air. and these are the green cells. and it means that the moss is still healthy because it's green. but they are pretty powerful. really good. moss fan. well, yeah — i am, somehow! laughs. as well as pulling pollutants out of the air, there's another advantage to these biofilters, too. here's a piece of moss and here's a thermal—imaging camera, and you can see the temperature is about room temperature. but look — when i point this at the air that's coming out of the moss,

when you switch the ventilation on, look how much cooler it is. so, not only does this clean the air, it cools it, too. and of course, pulling pollutants out of the atmosphere could help cool more than just your local surroundings. air pollution and climate change are also directly related. we have pollutants in air pollution — for instance, black carbon, which speed up the heating of the planet. and by binding those pollutants, we also help to decelerate climate change. you'll already see these biofilters in several cities around the world, although you might not have realised that you're sitting in front of a load of moss. and to make sure the moss is as effective and long—lived as possible, the health of each moss mat can be monitored from ho. an algorithm can control the irrigation, depending on the individual conditions. so, in the future, i would envision that many

buildings and the facades of the buildings would be covered in our solutions and, of course, you could also have motorways — large stretches. you could also use our moss filters to clean and cool the air and maybe even protect it from noise. moss on its own won't solve the climate crisis, but in amongst the talk of inventing greener technologies, it may be worth taking a lead from something that's been right under our feet the whole time. after all, nature has been regulating the environment much longer than we've been disrupting it. moss — who'd have thought it could be so useful? the lungs of a city! nature's natural filter. now, as companies try to reduce their carbon footprint and their impact on the climate, there are lots of different things that they could try. you could change your manufacturing process, how you transport goods or even move factories, but all of these are big things to do, so you really need to know which is going to work best. how do you do it?

answer — get yourself a digitaltwin! you make a virtual copy of your entire business and try stuff out in that first. alasdair keane's been to see the makers of dettol, who are trying to assess whether they can make their new products more sustainable or not. we use these kinds of products every day, from cleaning tabletops to personal hygiene and health. these brands are made by one company, called reckitt, and the industry to get them from factories to our homes is fast—moving and comes with a big impact on the planet. not huge, but important that we look at that carbon footprint and think how are we going to reduce it, decarbonise it? the product carbon footprint — that's everything from the raw materials all the way through to people using products — has to come down by 50% by 2030. that's going to take longer process. that's where we have to think not just about our factories, but the ingredients that we use, the packaging that we use.

to work out how they can meet targets, the company is turning to a digital replica of everything they do through a programme called risilience. so, this is it. this is the digital twin. this is risilience. this is risilience's version of different companies. we map them as a digital twin. we're looking at the data from a pretend company but the programme is bringing together lots of information, such as the miles that individual ingredients are shipped or how much energy each factory uses. it then runs lots of scenarios over the company to see how sustainable it is now and in the future. we've got a large team of analysts who compile a lot of data forecasts out into the future, looking at how policy's likely to change in different countries of the world and how taxes are likely to change. the digital twin is also helping firms map the impact climate change is already having on their operations. so, this is an example of its factories in the united states

and how they might be subjected to future patterns of hurricane risk. and look at how often it's going to get disrupted, the cost to the business of that particular thing. and then, a company can then start to make changes in the laboratories here. they can work on a new product, put it into the programme and find out if it will make a difference? exactly, yes. so, that's where we're heading next. safety goggles on as i've been given rare access to the room where the next big thing in cleaning could be on the verge of discovery, and where they're also adjusting existing product lines. we changed one of the ingredients, so it now uses lactic acid, and that's plant—based and it has a lower carbon footprint. and so, we looked at what risilience was telling us about where carbon footprints and maybe carbon tax in the future will affect us and we thought, what are the ingredients we can change? and by moving to lower carbon ingredients — things like lactic acid, which is developed from fermenting maize — we were able to reduce the carbon footprint and that means it's set

up for the future — a low—carbon, low—water economy. reckitt aren't the only ones turning to this tech. there are estimates the market for digital twins could be worth billions of dollars over the next decade. but having all the data on sustainability is one thing. companies need to act on it. i think when a lot of people hear about big companies and sustainability, they probably roll their eyes because big companies are out to make money. what is the balance there between being more sustainable and still bringing pounds in? well, the key here is how we can decarbonise and still grow. so, if we can achieve our ambition to be net zero by 2040, we can grow as well, and that decouples those two — those two topics. it could be years before we know if the decisions companies are making now will really help the planet. this tech is making that a little bit less of a gamble.

now it is time for a look at this week's tech news. google has agreed to pay duly for hundred billion dollars to settle a privacy case. it had been accused by a0 american states of misleading users into believing location tracking was switched off. the search engine it says the claim was based on policies that changed years ago. hooper says it expects people to keep using it even as their budgets get squeezed. the firm is branching out to let users book trains and busesin out to let users book trains and buses in the app but it also told us that more drivers have joined them. potentially we can serve those needs of customers who decide no longer to have their own car but to use us instead and in tough economic times, to me, that make total sense. food delivery firm _ to me, that make total sense. food delivery firm delivery _ to me, that make total sense. food delivery firm delivery says - to me, that make total sense. food delivery firm delivery says it - to me, that make total sense. food delivery firm delivery says it is quitting australia because of tough

economic conditions. the government has been putting pressure on companies to improve workers conditions. animal crossing's first cycling centre. ., , animal crossing's first cycling centre. . ., ., ., centre. intel has crated it land on the game. _ centre. intel has crated it land on the game, animal— centre. intel has crated it land on the game, animal crossing, - centre. intel has crated it land on the game, animal crossing, to i centre. intel has crated it land on l the game, animal crossing, to help educate us on how to recycle old tech. the firm says electronic waste is rising three times faster than in the world was my population. the steam train, first built in 180a, it made real travel cheap and suddenly everything seemed much closer to home. industry rolled on and by the 1960s, electric and diesel trains had replaced steam. today, around the world, most high—speed trains are powered by illiteracy. electra city. at this

really, engineers have also moved on from the past and into technologies of the future. where they are working towards cleaner rail travel. this is a little train that could be powered by hydrogen. the train itself is not new. instead, this is where old technology meets new and eight test of where hydrogen power might be a viable option on our railways. the technology beneath my feet is relatively new for the railway but one of the interesting things about this project is that this train is actually quite old, built in 1979. it has been retrofitted to run on hydrogen. what was a class 31a headed for the scrapheap is not a class 61a hydrogen powered train. the hydrogen is stored in tanks underneath the carriages along with the hydrogen fuel cell which converts the hydrogen back to electricity which powers the train. all that is

emitted is steam and water. the hydrant needed to parrot the train is made on site. renewable sources is used just lit water, creating hydrogen. that is then compressed, compressed again and then stored, ready for refuelling the train. but if most of the uk rail network is electrified, what part will hydrogen play? some commentators say that hydrogen is actually a distraction and what we should be focusing on is fully electrifying our railway lines. it electrifying our railway lines. if you have a route where you cannot do overhead education and the route is too long or there is not time to charge, then the hydrogen train. w can get a range approaching diesel, you can't refuel quickly and you can transport hydrogen multiple ways so the hydrogen train fulfils some

operational requirements you cannot meet with other approaches. it is not the only _ meet with other approaches. it is not the only area _ meet with other approaches. it is not the only area of transport looking to use this element. aberdeen is a city built on oil and gas but it is now home to the first hydrogen powered double—decker buses in the world. home hydrogen powered double-decker buses in the world. ., ., , , ., in the world. how does this work? what we have. — in the world. how does this work? what we have, what _ in the world. how does this work? what we have, what your - in the world. how does this work? what we have, what your head, i in the world. how does this work? what we have, what your head, inj what we have, what your head, in total more than 25 kilograms of hydrogen. that will pump the hydrogen. that will pump the hydrogen to the fuel cell here, it bases with fresh air and then in the process, we end up getting illiteracy that comes out put up this get into a battery and from there, go to the battery controller just the same as an electric vehicle. ., , . ., ., vehicle. to get these clean and ureen vehicle. to get these clean and green buses — vehicle. to get these clean and green buses from _ vehicle. to get these clean and green buses from eight - vehicle. to get these clean and green buses from eight to - vehicle. to get these clean and . green buses from eight to become hydrogen refuelling stations were set up around aberdeen, just like filling the bus with diesel. instead the pumps are stocked with hydrogen. when do you think diesel is consigned to the garages of history

and the majority of your fleet are running on renewable products cosmic five to ten years definitely. certainly, as a group, we will not be any diesel buses in the future, it will be electric or gas or hydrogen buses.— it will be electric or gas or hydrogen buses. it will be electric or gas or h drouen buses. ., ,, hydrogen buses. thank you, driver. it is not hydrogen buses. thank you, driver. it is notjust — hydrogen buses. thank you, driver. it is notjust buses _ hydrogen buses. thank you, driver. it is notjust buses looking - hydrogen buses. thank you, driver. it is notjust buses looking to - it is notjust buses looking to hydrogen as a fuel of the future. this is the first of its kind, zero emission hydroelectric hgv which runs of renewable electricity and like the hydrogen buses, water is its only waste. in like the hydrogen buses, water is its only waste.— like the hydrogen buses, water is its only waste. in the hgv sector, we've seen _ its only waste. in the hgv sector, we've seen hydrogen _ its only waste. in the hgv sector, we've seen hydrogen is _ its only waste. in the hgv sector, we've seen hydrogen is the - its only waste. in the hgv sector, we've seen hydrogen is the only l we've seen hydrogen is the only technology that is able to give the long range, the heavy payloads and quick refuelling time. if you think about what we currently do, which is, we drive around with flammable liquid in our cars with small explosions going around our knees and a tank of flammable liquid behind us, hydrogen is much safer because these tanks are very solid,

they have trouble carbon fire fibre reinforced. iiii they have trouble carbon fire fibre reinforced. . ., ., ., reinforced. if we continue at our current rate. — reinforced. if we continue at our current rate, scientists - reinforced. if we continue at ourj current rate, scientists estimate our fossil fuels will be burned out tiy our fossil fuels will be burned out by 2060. we know the way we travel must change and we can no longer rely on nonrenewable energy sources to fuel our way of life. with hydrogen and electric hybrid said to be the future, clean solutions are here to stay. i was in my coat. talking of clothing, we have spoken in the past about problems with fast fashion. these are clothes that are so cheap that they feel disposable. we have seen new ways of being able to recycle fabric but this week we are taking a look at a problem that ifor one didn't even are taking a look at a problem that i for one didn't even know existed. luckily, shona has found the

solution. we know that fashion hurts the earth. more than 92 million tonnes of textile waste is created every year. recycling is possible but chemical dyes and prints often prevented this. if you are anything like me and by merchandise every time you go to a gig, you may have loads of band t—shirts but sometimes your tastes do change and you are stuck with these logos forever. one team here in gothenburg are trying to change that. the idea is that they print the t—shirts, strip them back and reprint them so they can be used again, again and again. the start—up is not changing traditional fabric inks. instead, it has developed an invisible layer that goes onto the fabric first. made from entirely friendly ingredients. this can result allowing the top designed to be removed. what is the

tech that goes into creating this recipe? it tech that goes into creating this reci e? , ., tech that goes into creating this recie? , ., ., ., tech that goes into creating this recie? ., ., . recipe? it is all about a balance and trying _ recipe? it is all about a balance and trying to — recipe? it is all about a balance and trying to find the _ recipe? it is all about a balance and trying to find the sweet - recipe? it is all about a balance l and trying to find the sweet spot for both the functionality but as well as stability. we look at the charge of the component, we study the films that recreate through a microscope as well as the textiles that we are applying the print to. is there any waste product at here? we create the volume for what we are trying. we create the volume for what we are t in. , we create the volume for what we are t inc. , ., , , ., we create the volume for what we are t in. ., ., trying. the mix is applied at an industrial partner _ trying. the mix is applied at an industrial partner where - trying. the mix is applied at an industrial partner where it - trying. the mix is applied at an industrial partner where it is i industrial partner where it is easily brought into the screen printing process.— easily brought into the screen printing process. easily brought into the screen rintin: rocess. ., . ., ., printing process. hello, welcome to sweden and — printing process. hello, welcome to sweden and gothenburg! _ printing process. hello, welcome to sweden and gothenburg! i - printing process. hello, welcome to sweden and gothenburg! i think - printing process. hello, welcome to| sweden and gothenburg! i think you have a surprise _ sweden and gothenburg! i think you have a surprise in _ sweden and gothenburg! i think you have a surprise in store _ sweden and gothenburg! i think you have a surprise in store for - sweden and gothenburg! i think you have a surprise in store for me? - have a surprise in store for me? yes, i do. today we are going to print a click t—shirts. i yes, i do. today we are going to print a click t-shirts._ yes, i do. today we are going to print a click t-shirts. i am excited to see how _ print a click t-shirts. i am excited to see how it _ print a click t-shirts. i am excited to see how it works. _

print a click t-shirts. i am excited to see how it works. let - print a click t-shirts. i am excited to see how it works. let us - print a click t-shirts. i am excited to see how it works. let us get i to see how it works. let us get started. the final result is here. how could i ever want this to be removed? lise i ever want this to be removed? use it as lona i ever want this to be removed? use it as long as — i ever want this to be removed? use it as long as possible and lever want this to be removed? use it as long as possible and then remove it. it as long as possible and then remove it— it as long as possible and then remove it. , , ., ,, , , remove it. just for you guys, i will take this t-shirt _ remove it. just for you guys, i will take this t-shirt back— remove it. just for you guys, i will take this t-shirt back to _ remove it. just for you guys, i will take this t-shirt back to the - remove it. just for you guys, i will take this t-shirt back to the lab i take this t—shirt back to the lab and see if the technology can completely remove the logo. right now, this means putting the t—shirt enable with the chemical. it is then treated at high—temperature is and left for about an hour. afterwards, there is a secret technique and getting print to physically come off and it should get better as the recipe and the process is fine tuned. we have some traces left. the band logo has gone and i can only see a fewer speckled of pink. a

pretty good job. i reckon you could print on top of that and you would not notice. this would be good for recycling? definitely good for recycling. which is the main point so it won't end up in landfill along with traditionally inked up garments. another test processed more precisely without the delays of us messing about and filming has come up even cleaner. you can get it more less completely of we are 100% sure of that. wearers are not expected to strip their own teachers at home. the expected to strip their own teachers at home. , .., , expected to strip their own teachers at home. , , , at home. the t-shirt companies use our technology. _ at home. the t-shirt companies use our technology, people _ at home. the t-shirt companies use our technology, people get - at home. the t-shirt companies use our technology, people get to - at home. the t-shirt companies use our technology, people get to get i our technology, people get to get the textile and then wait to get back. ~ , ., ., ., , ., back. with several large european artners back. with several large european partners already _ back. with several large european partners already developing - back. with several large european partners already developing their| partners already developing their own garments, there is clearly an appetite for closing this circle. with more than 100 million items made each year, it is never been more important to make all textiles recyclable. i did keep one of these

just for my next gig, though. that is it for this look at some of the latest innovations that are helping to tackle climate change. it will take much more than those to make a dental on rising global temptress but when we see something that we think is promising, we will make sure you see it as well. i give are watching, we will see use in. it has been a wet start particular across scotland. writer conditions are going to spread on from the west later on with a mixture of sunshine and showers this afternoon. the area of low pressure is here and it has

been bringing in the wet weather. this cloud is our rain band that is sweeping its way across scotland, england and wales. what followers is those conditions but has also been a windy start to the day for south—west england we have had gusts of up to six to five miles an hour. so far, the strongest wins have been ahead of this rain band. that will continue to care through but then we get a second swathe of strong winds working into the north—west later on with gales played in the day across north—western portions. it will stay blustery and there will be lots of showers in the west. but to many for eastern scotland and eastern england once the main band of rain has cleared but quite mild with temperatures at 80 to 11 degrees. overnight, showers continue and it will stay pretty windy stop it is those wins that mean it is a frost free might. temperatures about four to eight celsius. tomorrow, the same area of low pressure are still on the charts. it has dragged its feet and isjust the charts. it has dragged its feet and is just working to the north of

scotland. again, quite a blustery day. another day of sunshine and showers. there will be some lengthy dry spells where the sun will be out but if you showers around as well. the most part, the showers blow through quickly on those strong winds but again, we could have lengthier spells of rain also to the area of low pressure in the north—west of scotland where it is going to be particularly gusty but even inland, winds of up to 30 miles an hour. those temperatures not changing too much. highs of seven and 10 degrees. monday, although pressure moves about records, it weakens a bit as well so it will not be as windy. still some showers around with lengthier spells of rain across north—western areas, some snow in the scottish mountains. that does mean there will be more snow in some of those scottish ski resorts. that is the case for the next few days. generally, the weather pattern stays unsettled so expect rain at times. generally it will stay pretty

mild as well. that is the latest.

this is bbc news — welcome if you're watching here in the uk or around the globe. i'm samantha simmonds. our top stories... after dramatic scenes in the us house of representatives, the republican kevin mccarthy is finally elected speaker — at the fifteenth attempt. it's not how you start it's how you finish, and now we need to finish strong for the american people. the uk's prime minister is holding talks with health officials in an attempt tackle the ongoing challenges facing the nhs. iran hangs two men for allegedly killing a security official during anti—government protests. a six—year—old boy has shot and injured his school teacher in the us state of virginia, in what police say was not an accidental shooting.

president zelensky welcomes the announcment of us military