oh, ready knows. welcome to take talk with him about hackers and paralyze between your societies. computers that out sure. you and governments that go crazy for your data. we explain how these technologies work, how they can only go routes and for. and that's how they can also go terribly, watch it now new to more than half of old people world wide live in cities. and it's getting hotter than what counting green building facades help to keep our cities cool. ornamental fish and the living room may look nice, but what are the environmental consequences? many people are increasingly exposed to heavy rain and flooding. scientists are now

asking why that floods or so destructive with more about all this now on tomorrow to day d. w. science magazine. an average of 125000000 people worldwide for victim to flood disasters every year and more than 90 percent of them live in asia. researchers say it's there among major rivers that particularly large numbers of people live in confined spaces like along the indies, where the in pakistan home to millions of people. at 1st, it's banks in september 2022 and the flat destroyed houses ruined crops, and resulted in death. the can we learn from flood catastrophes by doing research on them? it's only a matter of time before the next flood waters hit somewhere. this was the ar valley

in western germany. in july 2021. $200.00 leaders of rain per square meter fell onto already saturated ground. the massive amount of water destroyed everything in its wake. the natural disaster ran its course, but how did it get to that point? did authorities miscalculate the danger? only a few weeks after the disaster and the our valley flood water researchers at the causeway institute of technology published a report which stated that the flood risks were clearly under estimated. oh, come from unknown on time as a video to reflect some of the residents sent me videos. and in one of the videos you could see the water gushing out of the back of the out in our tunnel behind it . the entire street had been washed away. yeah, there was nothing left i had unwell working on the flood report. we looked at the historical records and there was actually a photograph from the 1910 flood. and i could hardly believe my eyes. it seemed to

look identical for things to gloat as of the fact fruit. it enters all as 52 people died during the flood of 1910, and that wasn't the 1st time in 18 o 4, it was even worse. back then, an estimate of 1200 cubic meters of water per 2nd raged through the our valley about the same volume of water as in july of 2021. that's according to the calculations of multiple research teams. neither the historic flooding in 18 o 4 nor later disasters and the early 20th century were taken into account by the flood protection authority. their research was based solely on measurements since 1950 as he stole tonight. these historical events her partly based on estimates. if you don't have any real measured values, so they're incredibly difficult to include in the statistics, you just don't do that. but my father at least until now,

directly after the disaster in the our valley, in july of 2021. the environment office in the state of rylon palatinate announced that it would investigate whether or not historical data could be included in future calculations. and sure enough, earlier this year, the office announced that maps detailing flood risks would be updated to include the additional data. but past floods aren't the only factor to consider. over the decades, the r valley had become more built up, so the flood waters couldn't spread out in the same way. meaning water levels rose a lot higher as this house and down now shows the historic flood level from 18. o 4 is here. in july 2021. the level was much higher. even though experts say it was the same amount of water that flow through the valley just eventually 2021 was so damaging was mostly due to the buildings now in 18. o 4. not as many people who lived in the are val ingram and the area was used differently and there

were fewer buildings should not swim on. the score followed 200 years ago. very few areas along the river bank were completely built up. so the water wasn't hemmed in and 2021, the water had less room and flowed higher. instead that effect was compounded by drifting debris which blocked up entire bridges. they became like dams, blocking the water with fatal results. professor and nestor, who has rodriguez from the rhine, mind university has used models to simulate what happens during floods. he's convinced that the threat posed by block bridges has been under estimated fingerprints or through it would be like me placing a plank across here, water levels and flow rates would change by several 100 percent me. the water would seek a new path and rise to new levels accordingly that these are scenarios that communities may not be prepared for him on the dome said me for the love scenes that played out in real life in the our valley causing damage is still not been fully repaired. so

how can people here protect themselves in the future building more permeable, bridges that don't clog as quickly would certainly help. but that alone won't be enough. which houses should be rebuilt and which shouldn't do it's not an easy decision. yes, i met a colleague in canada once kind of showed me the flood plans that he was working on . is it involved moving a whole town? 5 kilometers back from the river, kill him in canada. that's no problem because there's lots of space, but it wouldn't be unthinkable hears home. one thing is clear, most of the houses and the narrow our valley are being rebuilt. according to preliminary maps of the 9000 houses that were destroyed in 2021, only 34 aren't being replaced. i see it from the viewpoint of a disaster researcher who has lots of experience with natural disasters, with land, from my point of view of the flood protection measures being taken here are far too

weak. it's a climb and it's only a matter of time until the next extreme weather event hits. climate change has increased the threat of devastating floods and the risk is only set to grow. when the next flood comes, people need an early warning, so that lives can at least be saved and the worse damage avoided. in the summer, extreme heat can make life in the city unbearable. over the past 30 years, researchers have looked at air temperatures and humidity in more than 10000 cities around the world. they found that exposure to heat has tripled. something has to be done, but was living

in a concrete jungle can feel like being trapped in a waste land, bland, lifeless, and very hot in summer. but this high rise is going to be different. the entire 15 story facade will be covered from top to bottom, with plants, the projects in downtown munich ames to create green living for more than a 100 people. the greenery will have a cooling effect in the summer months and reduce dust particles in the i. plants that grow 50 meters high, killian lincoln has been planning meticulously to ensure it walks as, as we elisia. but it's definitely achievable, we just have to come up with detailed solutions. so for that, there are a lot of structural questions and questions about fire safety. them the amount of wind up building can withstand is critical. the conditions you have at certain heights play a decisive role, but in terms of construction, it's similar to what we have this commercial building and frank fat as being covered with clematis, japanese sedge, honey suck. oh, and of the types of plants?

yes, i did that and here of lanfield shooting were covering the sand with greenery. so the construction part of the project is essentially finished and we've reached the point where we can add a bit of life to this building. the most exciting part of the process. after years of work, killian lincoln and his colleagues have identified $300.00 types of plant suited for such projects. depending on buildings, location, and surroundings. they've also developed various structures to safely attach plants to the facade. air troughs affects to a frame on the wall. the plants are tied in such a way to withstand storms. the trucks hang above each other. that way, the plants only have to grow 5 meters high to cover the entire facade. the plants are watered by a trickle irrigation system and

a substrate provides them with nutrients. all of this costs money between $500.00 and a 1000 euros per square meter. but kelly and lang and says it's worth it. vanish are all on volvo as men. like most people, when i need to recharge, i leave the city and head out into nature. i like to feel see, an experienced nature in the temperature is cooler, the air is better for the sake of the feature of our citizen. we must reach the point where we bring nature into our cities and because it is possible, wisest murderers. the occupants of this building a hoping the greenery will create a cooling effect next summer, when it will look like this. the green walls aren't just that to improve the aesthetics. as plants provide shade and adap, right water, they also cool their surroundings. a benefit that's particularly important due to urban overheating in this era of global warming.

similar efforts are underway in singapore, the architects of the i wager hotel designed it so the parts could cover the entire facade of the $27.00 story building. the plan is that 25000 square meters of greenery to eventually grow on its exterior. the facade is already 7 degrees cooler than the surrounding air, and $25.00 degrees cooler than nearby buildings. the concept has yet to be used on that scale in germany. but kilian lincoln and his colleague melon, up, already at work on plans to cover a 60 meter tall building in dusseldorf. home to live at home for the moment when the building will house apartments, offices and restaurants off work living and leisure activities, all in one space with a bit of added green flag. as nice as that sounds plumps of flammable

designers have to take into account the increased fire hazard created by covering buildings with greenery. that's why killian lincoln and his team have to pass fire safety tests. here for example, the flames might be high, but they don't spread with a defacto fiscal stood hum. what we found is that fire only heated this structure, a hanging rear ventilated facade to a temperature of $270.00 degrees. that significantly cooler than a building that isn't covered with greenery. the water contained in this structure actually caused the facade of the building of, in other words, it protects the facade from more severe fire dimension. so to push the should honesty, posada da formed, stagger them. johnson, him green facades could be a model for cooler cities in the future. even if it's going to take some time for them to become more widespread.

all over the world, people are building. for decades, the motor was lots and thought and preferably with concrete. in the meantime, architects and city plan is have realized that building need to be sustainable energy efficient and environmentally friendly like so does the use of buildings living in so called whole apartment is a new concept. these pieces of mobile furniture are almost complete. eva maria cooper and my ts virtually are moving into their new home in the coming days together with their 2 children. but 1st they have their work cut out for them . because the whole the mobile stairs are needed to reach the upper floor book, but they also serve as a closet because their private living quarters will be tiny. so they need to

maximize their use of space. these are often, but they can't wait to move in. in hollywood on it. i mean we realized that hall like this would give us the greatest flexibility and options of the was, were freely design our living space as we want. and when you have more freedom, you come up with really cool ideas. no e laskey the for the for if i don't like you than me ever. and then we have everything here. we adults can design our home as be wanting to handle it, but the children also have their ariana kindergarten. they have their kindergarten here, and their friends are here in the same place north, so it's really get yeah. like a pull. the hall measures 275 square meters. a large part of it is still a construction site. various pieces of furniture are in production, some made of bamboo. the space will be home to 11 people. in addition to camino areas like the kitchen and bathroom, they will each have their own private space. let's see what the pieces of furniture

measure just 9 square meters, and they're on wheels. that does a steven roll concept them. that's the idea behind these movable spaces. if you want to go over to the other corner, you can just roll over there. it's fun. and each time you move the design of the room changes, we are the only say exalted. there are 8 halls in total located inside this building near zurich, main station. the complex also house is another 50 apartments, as well as small businesses, a theater, and a kindergarten. andreas b letter is overseeing the project. he says, the set up also makes sense from an environmental standpoint. as it makes better use of urban space in their morale is left to call by building upwards. also with your furniture, you need less living space per person per month plan, and our per hopes nor any good plots bottle and saving space is the most efficient thing to do. if you want to build and live in ways that are green and save

resources or her sources, pardon me in bilbao and on devona. so is this a model for the future with a whole common freak from the god leap done by law institute and independent think tank near zurich and switzerland says as a real need for creative living solutions. no frog. no. and i have orn fordham and one expert in the lot of demand for new forms of housing and experimental ideas and not enough on offer on 2nd hour. now with the pandemic and many people working from home, there's a chance that more space will become available in chicago. so office areas that are no longer being used to provide space for whole style apartments or other housing experiments should high level warner audit on the, on expert him in the cell phone van nicholson ran, it would be nice if people who would like to live this way had the possibility to do, say to that one if they weren't just for rim apartments on offer, as it's sometimes hard for families, luxury of acre duty,

the food hall apartments are now also available in the swiss city of baron. perhaps it's just a matter of time before the idea catches on elsewhere. coral reefs on whom to thousands of plant and animal species. but their habitat is under threat 1st because of climate change, the average temperature of the sea water is rising. this can lead to so called coral bleating and the death of a really large amounts of fertilizes and the sea water are also a problem. this has because they caused too much ality to grow, which deprives the corals of the light they need to survive. and then there are people who want to have colorful marine fish in their own home. tropical coral reefs are considered the most diverse ecosystems on the planet. that the rain forests of the sea, their inhabitants uniquely beautiful. and that's exactly what's putting their

habitat in danger. these tropical being hunted for the trade and decorative aquarium fish swiss to ologist, monica biando from the france vapor foundation for species protection has been researching the industry for years. the leaving counties that caught alan fish in the hobby touch of these core fish is as every one knows, extremely endangered. and if the coral reefs disappearing done, hold a 3rd has already been destroyed. and yet people are taking the millions of fish out of the reefs to be kept on aquariums in health up. they have no idea exactly how many they're taking and what consequences it's having for the reef. it has caught all in that in 2016, her research took her to su, noisy and indonesia, where she saw people hunting apprised, bang, i called, and will fish. they live in small groups, seek protection among the corals and plants, and are easy to trap in

a fishing net that's time. these called all fish into an endangered species for the community hunting for tropical fish as a welcome source of income. but the consequences for the ecosystem of coral reefs could be fatal, escaped on for so coin from iceland. fission is globe being studies done on individual types of fish calling from the cleaner us. as for example, they picked parasites of bigger and smaller fish and seen. they're like the health and devices of the revised quote, alden that a 5th, when one hop on to soon came off to a month, there was an experiment where they took out all the cleaner roses expertise. and the health of the coral reef really did break down on a number of species, declined on every fish in the cover wreath plays a role euthanize. so it's important to understand what happens when you remove these fish from the environment. so can boss proceed on monday, sufficient household meet them. laban found research shows that between $40.50

coral reef fish end up in aquariums around the world each year. it's a long and often deadly journey that it clean officious aka hits, moll dead fish. he said as some one fishing on a small scale in the north of barley, i thought though fish for different species and take them to an intermediary that had thought that the fisher put into plastic bags and kept to high temperatures, tropical temperatures. lauren is not clear how many fellows die in this browser, sorry, but the rate is very high. it hawk when they sit in the city, then they go to the next in amy dri, and so on until they reach the exporter. and only that person knows how many fish are being exported to europe or pot export via an estimated $4.00 to $5000000.00 tropical fish and up in european aquariums alone each year, summer imported by e fs, a wholesale tropical fish retailer in the southern german city of his honor felt

the company receives 2 to 3 shipments a week. that's between $3.50 fish each week, and more than a 100000 each year. these fish and plastic bags have just travelled some 9000 kilometers by playing stefan smoke se, and his father bound a pin in the business for more than 30 years. they know all their suppliers personally. their company is one of the biggest tropical fish importers in europe. the sensitive coal refresh need a lot of care, but include specific lighting and their own special water preparation to ensure the new arrival survive, chef, unquote, saying 1st gets them used to the home, made salt water then comes a week and a quarantine tank. it's a lot of work, but business is booming there, but the opposite end of a demand has gone up because people want your own marine animals. johan, listen, and the technology and equipment to keep them has become

a lot simpler and more affordable. i am for her grants to your give ordinance stefan schmidt saying is project and growth of more than 10 percent this year. that would mean e fs will soon be selling half a 1000000 marine animals annually. but buying your own underwater wealth is anything but cheap. a well filled aquarium can easily cost about the same as a small car. a single fish can cost several 100 years depending on the species origin and its own unique beauty. thus, before you've added the corals and other marine life for your own little slice of the ocean in your living room, those who don't want to pay such a high price come visit their local aquarium. but here to almost all the creatures on display have come from the wild. if an aquarium fish dies,

chances are it'll be replaced by one taken from its natural habitat. study show that the uncontrolled catching of fish in the wild is endangering the stock of at least 10 types of coral re fish. experts likes it. well, i just wanna copy condo according for the industry to be regulated. then one vice, the better or to corral and that if, when you know how endangered to columns resolved, that it really makes no sense for this industry not to be regulated. because we should know where the fish are coming from holland down to the exact location where they're called shellman regulation of the tropical fish trade in europe. and better control locally where the fish are caught. neither would spell the end of aquariums, but they could help better protect extremely sensitive coral reefs. because without these unique ecosystems are aquariums will also soon be empty.

if i was let is read why i think you have a science, clifton, send it to us as the video text or voice message. if we answer it on air, we'll send you a little surprise as a thank you. come on. just does this next question comes from to mary's alvarez rodriguez from brazil. why don't the moon in the sun fall to the earth? gravity pulls us towards the ground. the more mass a body has, the greater its gravitational pool, but the effect decreases with distance. however, gravity can be overcome and a carousel. for example, the faster we spin, the stronger the centrifugal force which counteracts the force of gravity, satellites, and the international space station orbit the earth so fast that the centrifugal

force almost completely cancels out the effect of gravity. if the 2 forces are balanced, matter becomes suspended. the celestial bodies within our solar system are also constantly moving. the planets rotate around the sun if a center, the balance between gravity and centrifugal force keeps them on stable orbits. mm. planet earth hurdles, through space at 30 kilometers a 2nd. at this speed and distance from the sun, the earth moves on a stable orbit in a perfect balance of gravitational pull from the sun and the centrifugal force pushing us outwards. the moon isn't stationary either. it speed stops it from crashing to earth. any earth's gravity keeps it in orbit. and the sun with its gravitational force, keeps all the planets of our solar system in orbit. and our solar system orbits

around the center of the milky way at 220 kilometers per 2nd. nothing in the universe stand still. that's it for tomorrow to day d. w. science shed. glad you could join us. see again, next week, till then tuesday curious with ah, ah, with

ah, with who i want to talk to you about inequality. the 77 percent. my county is kimani and had cool talk to the people who feel left behind the street debate from lagos. nigeria is in norm wants to resources. now pick up,

the problem is that if you got 15 on the combo with all the might see why is nothing changing the 77 percent 30 minutes bond d w o, how many push it out in the world right now? the climate change. if any, off the story, this is much less the way from just one week. how much was going to really get we still have time to go. i'm going all with his subscriber along with we're all the good to go

beyond the obvious as we take on the world 8 hours and i do all the we're all about the stories that matter to you. whatever it takes. hi, denise, my follow with you here. we are your is actually on fire made for mines. so how did she become at all for hitler's favorite director? and how did he become a forgotten filled pioneer? ah, leaning he finished and arnold funds between hitler and hollywood. in 1932, they sent out into the icy wilderness of greenland to create

a life threatening a film project that became a major milestone in their lives. love, seduction and power. ice cold passion starts october 8th on d w. ah ah, this is d w. a news live from berlin. final preparations are underway in london for queen elizabeth state funeral. the public lying and state ended a short time ago, mourners queued through the night to pay their respects to the monic and just hours from now leaders from a.