the signage, research and the i c d w the last year it was a year of extreme weather, extreme storms in libya. extreme rain, for example in brazil, the and extreme heat in greece. the scientist say that climate change is going to make stream, weather events more frequent. how can we prepare our cities and rural areas for this new future? stay tuned for all this and more coming up on dw science show. welcome to tomorrow

. today the su sling hot heat waves are becoming an increasing problem in urban areas around the world. rising temperatures and humidity can also lead to torrential rains with stormwater that can overwhelm urban drainage systems. but architect christina ice and bond has come up with a solution. here on the 10th floor of an adaptive high rise built by the university of stuttgart and south western germany. she's been testing her idea under real life conditions. our approach involves creating surfaces and building decides that can absorb brain water which can then be used in the building and later on during a hot spell that water can be used for evaporative sustainable cooling a hybrid. her solution involves special textiles called hydro skin, ellen and that are attached directly to the facade inside the high rise,

there are special tanks that store collected rainwater. on hot dry days, this water is returned from the tanks to the facade element. the windows are covered with 2 lightweight textile skins which are separated by a porous space or fabric that allows the air between the 2 layers. to circulate the water can evaporate, helping to cool the buildings interior and improve the microclimate outside the building looked into this metals before. if we discovered that if we were to equip this entire building with hydro skin in all stuff, we could cool down a specific volume of air by 10 degrees celsius in cartersville, paved surfaces and the lack of trees and vegetation are also heating up our cities . and turning city roads, inter rivers, after

a heavy rainfall the high drove skin facade elements can make a difference. here too, in a downpour, they remove some of the excess rainwater and funnel it to the tanks. the rainwater is 1st collected by a file on the inside of the element, which then drains the water down into a profile system. that water can then be put to various uses for flushing toilets, for example, or to cool the building. and test show that the system works. and we installed more than 50 sensors in our test stations, plus one weather station on the facade, and one on the roof sato. the sensors measure how much the facade is cooled during hot weather. and how much water can be absorbed when it rains? test station 2 shows. there were 640 grams of water in the batch must like some system. after about half an hour of rain. there is 974 grams of water. in principle,

the textile can absorb an unlimited amount of water. what matters is the profile system. in the profile system, the water pints and metal frames determines how much water can be captured in a downpour fearful lung. this here shows how we refine the technology item. this profile system is large enough so that it could handle a once in a century rainfall event, but still slender enough that it wouldn't interfere with the architect tonic anesthetic aspects of the facade. pushing upon you. in many cities around the world, sewage systems can no longer handle the run off from frequent storms. so rainwater retention setups will become ever more important. christina, ice and bonds, hydra skin system, is made of synthetic fibers that are almost completely recyclable. and instead of

bouncing off the tech style structure, the raindrops are almost entirely absorbed, making for a very efficient harvesting system. the architecture of some of her inspiration from textiles used in other industries. the event they're also used in the automotive industry and car seats, for example. why is that? because people don't want to sweat on long drives and they want their sweat to evaporate quickly. so the material encourages air circulation. that's also useful for our work, since it helps the water evaporates and enhances the cooling effect for stack architects have long been familiar with the principal of, of operative cooling, the new high tech hydro skin fabric is an extension of that principle. and it's so lightweight that it can be retro fitted on most any building that i should take. as an architect, i can imagine all sorts of design possibilities, beginning with different colors, patterns, logos, and images, or even incorporating movable elements onto the facade which could be pushed back

and forth, folded in and out, or even flipped back and forth. and the possibilities are almost unlimited. water can make urban heat. pilots more bearable, much like a fountain can cool us on a hot day. eclip with evaporative facades, entire buildings could create sustainable cooling micro climates. and that might happen much sooner than we think. the hydro skin fabric has already been patented in a down for when $15.00 to $25.00 leaders of rain per square meter fall in just a single hour flooding can be a real problem. the simulation for this, we just city of golf and birds shows what can happen. one problem is that most urban spaces nowadays have been paved over. the rain can't be absorbed, leading to flooding. due to climate change programs to weather improve, our cities are growing increasingly important. hamburg and northern germany is leading the way climate change is bringing heavier rains and increased flooding to

many areas. come back, gemini is no exception fonts. why hydrologist, andreas cooling becca wants to help with it and watch it brief. the city kind of worship some vendor. we can only protect ourselves if we know how big the button will be in the future. let me and if we don't carry out measurements, what we can do is guess of out to the scientists to set up the t y, the stations that send him data from every corner of the city. these precipitation gauges show how much rain has fallen in each area. and when they're going online, alpha, this is basically a target that collects the precipitation of the new dot lock ultimate. and it weighs it using a very precise scale just yes, we can see in real time how much rain is full and in this location, they stay to refuse to calculate what might happen in the future. they must have shown invest good at c, and then we need to understand what would happen if we had

a downfall with an intensity of 8 or an intensity of 10. missed the name of ok. it's better if we don't wait until we actually have that kind of rainfall event. the more than a said feed our models without data and use the models to predicts what happens again, go to those are constructed. this kind of weather data will help them and this up a water authority plan for the future. andrea is cool and becca and his colleague andre aspire are using new simulation software to generate a model for handbook. they can now generate predictions that every address and location in the city using the simulation software that testing various solutions could a trench in the city park helped. i'm good x x ray more to me. it's just, i wouldn't make it too big. i don't think it's necessary is let's start with 10 centimeters. okay. okay. okay, sounds good. on the other side of the street,

a retaining wall could protect the houses. they sketch it in and the software calculates where the retaining wall and the trench with dice. it will to canada, to check it, raising it, made a difference. let's good buffed up. yes. okay. the water only reaches the curb and everything else flows towards the park, just the way we want it to nice position in the park. the ground will soak up the will to one example of how humbug is being turned into a sponge. city areas where water can see into the ground, green rooftops, water permit surfacing and rain water tanks are all part of the package. rainwater it will be put to good use right on the spot sustaining plants doing heat waves and allowing for evaporative cooling,

making 100 more climate resilience. 10 victim dish dot. turning the city into a sponge city would be beneficial into lays on it. so 1st we'd be reducing the button, it's heavy rainfall and we'd be reducing the burden of long dry spells. it seemed that even lost on by learn for. so we'd have a win win situation, a big one. also protecting our drainage and drinking water supply systems between those affairs also stay in the cities. schools are also getting in on the act. this school yard is being re thumped in accordance with cool becket. simulations, environmental engineer of and politic sun is in charge. it's another layer in the transformation of honda into a sponge city. a city tilted with areas that could absorb water by not almost all the roofs drain into retention basins. that has several advantages, but it's good for the natural water balance and helps replenish the ground water, plus the evaporation from the base and cups cool down the city, including an effect for the stop sema gives to you. here you go

to the top of the embankment on the top right under. yep. of the most popular tide. yeah. phone doesn't were 9 meters 90 made on the wednesday? sure. okay, all right. let's see, minutes, fundraising, a school who becca enters the new base and into his model on one's a computer. mm hm. so it's amazing how much it base and like disconnect. so i'm kind of does this price is a nice, a lot of how we come up with an idea of in say it reminded me to do all sorts of measurements and simulations. you own the modem, then we want to become a reality here in the school we often is you have to do that. and it says next, it's one of the great parts of our work. and it's usually mostly of 19 year old son in all a number of other areas in the school year out of those they've been turned into sponge. it's like here, behind the school,

the large areas of asphalt, were removed here, and replace that with the water permeable surface. these that allows the rainwater to seat them to the ground water that's hands in school. as you can see, the water 1st starts the flow, but pretty soon it gets absorbed and then flows down into the ground water. the rain helps keep the soil here moist rather than just ending up in the city sewage system. so we should be fine. what's important is that we get started getting that we start trying things. i'm gaining experience bit by bit and so we have more going to relate the generations. we'll learn from our experiences and maybe improve on it device to best off. and as we have someone has to take the 1st step and what time i begin by working with low to rather than against it. and the is implementing nature of a solutions for a sustainable feature with minds about science bounced technology. that's like d, w signs is now on take talk. what do you do for fun?

why do gravitational ways that that is when the people begin getting high and laughing gas out, the drums boogie to the beads. and what's the perfect king footboard find? find the on says, gets most dw science own new tick tock channel is read. why are they if you have a special science question, send it to us as a video, text or voice mail. if we answer it on the show, we'll send you a little present as of thank you. come on. just ask. this week you were question comes from p g in south africa.

is there a difference between clouds and folks? physically speaking? no, because folk is nothing more than a cloud above the ground based consist of tiny to drop that slicing in the these drops it's a foam twin will to a desperate storm lakes, rivers, or oceans. today to close, it rises and condenses. the main difference between salt and clouts is how high they are. if it's cold enough, near the ground, for water vapor to condense that forms of visible max, this happens most angleton and winter. as soon as the mazda flew to bankrupt structure rehabilitate to see beyond the kilometer away, we couldn't smoke cool. other visible accumulations of water vapor includes clouts, scientists differentiate between a total of 10 types according to the around to toot. high level clouts,

also known as cirrus clouds, farmington altitude of $5.00 to $13.00 columbus because as it's very cold, the, the made up entirely of ice. the middle clouds phone between 2 and 7 kilometers above the ground. they include a type of cloud, noticed ulta, cumulus, low level, klaus, a cub, a low, a heights of 2 kilometers. so i'm like the straight to scout a so close to the ground that they're roughly referred to as high folks. the investor who clouts extend very for several layers, like for example, the cumulus cloud, which also looks like a cauliflower at the top. the molten house of the surface is typically covered by clouds, advice, clouds and salt plain into to roll and meteorology. they regulate the schools to

balance and have a big impacts on the climate the clouds fog and miss direct kind of atmosphere at water vapor in places that are especially parched into air. it harvesting water from the clouds could make all the difference. that includes regions like the middle east and north africa, and particularly places where the clouds are practically close enough to touch the early morning clouds of gathering and the mountains of ground come out here. the strange structures will capture them on the phone or leave a is an environmental technician with the life and you have a lot of projects here. he's showing a trainee the principal based on nature's model and see government laws linking it

. but it has like an extra moisture from their low man. i'm afraid he got them. they sucked it up to like a small issue. the for my view unusual structures take advantage of a common phenomenon on the north side of spain's canary islands. crowns move in from the atlantic stall on the mountain sides, the shone or leave and his colleagues of setup for collect as cloud catches fell on monday they soak valuable both in the same way. that like i'm to do a name or when i my yeah, don't the near let go when push as far as the entities financing that the that i bought, i bought him back to and lot of a tiny water drops the grow into bigger drugs in there but i had it, i don't know what that is, which then fall into the collect. yeah. love on the flow. yeah. into the transfer.

that's what the some of the roller they heat allow us, you know, the in total, they've collected 90000 liters of water over 2 years. water is gas on grand canal area. the reservoirs of running dry. the art conditions i'm making wildfire is more frequent in 2019 and was hit by devastating fire 10000 heck to as far as fun. down 9000 people have to be evacuated. that we'll see the look as a cuz he said that's what he meant, that it's a vicious circle. gotcha. the lack of water means there's less healthy for it goes on to the weighty and everything that drives down 50 because here, cuz this is her and mainly our fuel 50 for the fire, the funny little bucket for what was full. so the reformers think, planting trees, species that will make the forest more resilient and they also use more to from the cloud couches they ask the floral forces to grow here that will

work like a natural fog catcher was left on cnn latrice. take the water from the clouds and pass it came to the ground with a scene for internet. so that means it could be the future of the island. and i see for now the present is dominated by agriculture. economically, the canaries depend on but non across about each tree needs 20 liters of water a day. one where i'm on source works. i plantation in the north, a grand canada. he's worried about warranted because rain is becoming ever more scarce. the never let me see what there is one option, the treating it is expensive over the income because i don't see what i really will do about the good large scale feels of phone couches in the mountains be a solution, the

solid or leave trusts. and the research project is working on new ways of capturing moisture from the clouds several years. but yet they expect this metal grid to a much more efficient than the plastic mesh they've been using sofa split. so might have been the goal, so not too badly using a sustainable and natural resources like fog could be a good solution for godaddy. fancy. uh, but uh, we could water our trees seedlings with it and everything was done in a farmer could use the water was on the plantation when that was done to the the hour for that to work. so crowns would have to continue gathering him in the mountain sides. if there is a change in weather patterns, cloud captures might also the full victim to climate change. after years of extreme drought and late 2023, a short rainy season, broad exceptionally heavy rains to ne, down for

a car. the ground was so dry that it couldn't absorb the water which led to severe flooding. for one of the water could be stored in the sand to help balance out the cycles of droughts and heavy rainfall. in kenya, local communities had begun implementing the sustainable solution, the honest a. c. m, a. loony is working for her future and the future of her children and grandchildren . together with other residents of oakia in southern kenya, they're building a sand down. the water stored here in the rainy season will help sustain that community to in the dry season. draught in the area was not so nice visual stuff. we couldn't move long distances. so we decided how can we stay in this direction for a long time? kinda mixed up sometimes because of the what uh, no idea. the mach wendy region is no stranger to extreme weather. there are 2 short,

intense rainy seasons each year. but the rain water seats away almost overnight, and the rivers dry out the sand down. we'll store this rain water in the river bed and keep it from evaporating. as quickly they fix the sun to us. is that the, it at this last point that's a, a, a lex and a store is the water. and basically, um send uh will provide that medium where the, the, what i had to start within the, within the funds wanted me to below will not ever for it. but it shouldn't be available for the communities. local communities do most of the work themselves. it's not always easy to find enough volunteers digging is hard work. building the dam costs about 2000000 canyon shillings, or about 15000 bureaus. it's made of mostly local materials, like rocks and send to,

once they've collected the local materials. then the other thing that you need, which comes from outside the communities this, i meant the state that is useful. this population of the done and y plus the team, but you can see which ones they formed like of the fund. i'm not far away. there's a completed send. it can store up to 50000000 liters of water, a boat for farmers like peterman gucci. these days he can pump water directly from the river. he mainly grows collard greens, tomatoes corn, and let us. and his crops are thriving. whatever the family doesn't need is sold at the local market. the water from the down has made a real difference. i mean, we were supposed to plant trees, but there are no trees without water. there were so many challenges, so we used to grow vegetables here. when the water disappeared, everything withered and died. well, that goes, imagine you've got coke. at 1st glance, it's dry as dust here,

but appearances are deceiving. 2 meters below the surface. there are millions of leaders of water, all filtered by the sound. the dam has been supplying the surrounding community for 4 years now, even during the dry season and room lucila explains how it works. we have the concrete or we and number with the store to and to avoid the then that's what a see what the through, by bought at that bytes to the, some the, and from the some the what ice pumped to started to dunce with the communities. i bought to draw what the for human consumption or the rain that falls here doesn't just evaporate. it's stored underground. a system of pipes linked to a solar power unit. pumps the water to storage tanks. people here can now grow new varieties of crumbs, ones that need more water. we brand even groves,

which we are not able to be brando dean, daddy, thank you for i do business. who could you brand them where they is brand new? what i need those? i audio we received corps underwood climate, but you know, we have our dunden with so we can also keep the same women also benefit from these local sam dams which receive much of their funding from our can nova, a foundation based interest in germany. instead of walking long distances to fetch water women canal fill up their canisters directly at the local water kiosk. during the walk this on dumb luck, i size place epic on the patch of what we do during our community. mobilization is to encourage the communities to be part of the process from this dr. event. and also we emphasize on the importance of them, but the spacing at every stage. defendants may seem simple, but for local communities they can make all the difference. their hard work here

will pay off now and in the future. that's all for now. thanks for watching tomorrow today and do join us again next week for another additional dw science show you that the the

americans generally within the sprays. the country now has more guns in people while active as lobby forest stricter regulations. the number of mass shootings continues to right. is there still hole in the battle against gun violence? gun nation. in 15 minutes on the w. b. trust. rio de janeiro is also casing in waste.

the inhabitants of the mega city have had enough. they are now cleaning up with the city administration has said that it's a never ending time. in 90 minutes g w. the sometimes a seed is all you need to allow big ideas to grow or to bring an environment to conservation to weiss with learning like global ideas. we will show you how climate change and environmental conservation is taking shape around the world and how we can make a difference. knowledge grows through sharing, download it now for the

every jenny is far less surprising. we've gone all out to give you some tips in your northern most count, the police the free time, but still very much alive. your guy to the special hot spots in germany recognizes where exactly. it was fun. i have learned a lot of our culture history. all their travel extremely worth a visit. the

. this is dw news live from berlin, cochin kills my husband, alexi, nevada. these widow calls out the russian president in an emotional video, you'd be a novelist, naya vows to carry on the kremlin, critics fight and says russian authorities are hiding his body to cover off his murder in prison. israel gives him off the deadline for its planned ground defensive on rasa. if by a rama the hostages low told the fighting, we continue. that is just.