as much as possible. so now we are going to take a sample. i can do it? for sure. let's tweeze some moss. 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.

moss fan? well, yeah. i am somehow. as well as pulling pollutants out of the air, there's another advantage to these bio filters, 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 and look how much cooler it is. so not only does this clean the air, it cools it to. 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 bio filters in several

cities around the world, although you might not have realized 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 hq. 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 would 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 digital twin. you make a virtual copy of your entire business and try stuff out in that first. alastair 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 table tops 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 a 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 resilience. so this is the digital twin. this is resilience. this is resilience, a 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 policies 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 now use lactic acid that's

plant based and it has a lower carbon footprint. and so we looked at what resilience 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 a 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 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. and that's it for the short version of the programme. the full length show can be found on iplayer, where we'll have more of the latest innovations hoping to tackle climate change. now, it's going to take much more than those to make a dent on rising global temperatures. but whenever we see something that we think is promising, we'll make sure you see it, too. thanks for watching. we'll see you soon. bye—bye.

hello, there. more rain to move in from the west over the next few hours, some of it heavy for a time. around another inch of rain falling for many, and that will drift its way steadily eastwards by dawn on sunday. so some heavy rains still, again, across parts of aberdeenshire. falling over that saturated, flooded ground down into east anglia. not too bad a start, temperature is around five to seven degrees. first thing in the morning, then, that cloud and that rain will gradually ease away. sunshine will come through and then, as we tuck in from the west, we'll see some sharp, squally showers, some of these heavy with hail and thunder. top temperatures through sunday afternoon between seven and 12 degrees. as we move out of sunday into monday, there's yet more wet and windy weather to come in through northern ireland, wales, south—west england, gradually pushing its way steadily northwards, but it should be a drier day in scotland. top temperatures of seven to eleven celsius.

take care.

this is bbc news, i'm annita mcveigh with the headlines for viewers in the uk and around the world. fifa's president hits back at western critics of qatar's human rights record, accusing them of hypocrisy. i think for what we europeans have been doing in the last 3,000 years around the world, we should be apologising for the next 3,000 years before starting to give moral lessons. the final details of a deal to help the poorest countries worst affected by climate change are being thrashed out at un climate talks in egypt. rishi sunak offers ukraine an extra 60 million dollars�* of military aid to help counter aerial attacks, in his first visit to kyiv since taking office.