the now when we say they're about never giving up every weekend on d, w, the, there are 8000000000 people on the planet and more than half of us live in urban areas. living space is getting tight, temperatures are rising and cities are getting 30 or 2. it's time to cool things down. how about with plants? they help cut air pollution to wraps. meanwhile, don't mind heat or dirt. they multiply rapidly know on everything from vin liners to cables, and can transmit diseases in berlin. their successfully kept in check. welcome to dw science, show the

funding, a booming capital with a booming approach calculation, such a cool plus work. so the city's was a company who deals with problems in the sewer system such as rants, because here like elsewhere, plenty of them living on the ground. really not the on your found that i are clearly and has 3.5 to 4000000 resident and 6, a growing c. i'm with food constantly available. that should be around 2000000. right. so yeah, but i believe the number is much lower than that because you'd see these routes. and when i opened the shaft, i don't see say 10 of them running away. which would mean that what hundreds in the tunnels who are not in the city definitely has a large number of them, i guess between 20300000 souls. to keep the rats at bay a pleasing bait with a strong anticoagulant is inserted into every other man how

a man a few days of to reaching it, the rock dying from internal bleeding rats and not welcome in germany's south west either here to a highly active poison is the primary method of control. big stuff, that's why we use the 2nd generation attitude ingredients and a bait like this. we're going into the milligram range teaching. it just once is enough to killed the rap. so does he go to one step? where does the rest of the points and end up? we were in a forest in north, in gemini wildlife biologist, or the corner from violins like knits institute for wild life for such is keen to find out how far right poison can spread throughout the environment. and whether it can be found in wild animals like this, young, white tailed eagle gifted out. so i can give that to you. and um, i know the 2nd generation talks and have

a hall flowing says around 4 to 5 months item. yeah. but sometimes up to a year, so you can say it varies from about $5.00 to $10.00 long his interview. that's how long the talk since the recently detectable in the old and savannah most of ingested them. the team is biologist, 7 deed found rent, police. and in the eagles, blood did the to poison dropped, possibly even the right. so not typical pray for eagles. and they usually good at hiding tube. but it must have the so many routes of police and that not to own if the managed to hide, they stay accessible. all they move around in vegetation like total grass and then cool by predators. you haven't done phone these then often and dying from the poison themselves. it's called secondary poisoning. and unfortunately this happens quite often. this complied, i left a message for me, so the eco lives not an isolated case. fox is poll caps, head chokes, and song bugs can also be contaminated with wrapped points and sometimes dealing as

a result. it's in a non thing situation. the poison is more widespread in the environment than previously sold. that's why all of aqona and his team are also keen to study dead animals. the autopsies finding is dramatic rodents. it seems weakened by rat, poison, and found in the wild can be welcomed. pray for white tailed eagles. let's keep that all along. doesn't, won't be tied as also new research showing that even fish can ingest and accumulate 2nd generation right? poisons and the white tailed ego, whose preferred praise fish can end up accumulating this poison from fish through its role as the end consumer deficient. otherwise, summit down for this can lead the poison bates placed in the mine holes to be washed into the sewage system. that's because in 80 percent of old gem and municipalities poisoned, bates hung loose and unprotected in the mind. ho,

funding wants to prevent the rent police and from spreading into the water system. so engineer is a testing out new methods like this floating bank books. as a side here underneath is a foot which provides the base as a cable which secures the bowl and allows it to float. it stands securely and the bait is safely inside the bowl. also, the handling is much best time to best with him. thank and right populations can be cubs without using any points in the tool. the next test shaft contains a high tech device. a trump triggered by census controlled via the internet. yeah, man ends, lackland esteemed when we now have an impact on the system in here, which is designed to ensure that the rats killed by spikes as they pass through the so in other words, that kills quickly and precisely, and then carried away in the waste water flow for 2 years,

what's unique about the system is the 2 communicates with us. we can enter the results online and see the numbers of rats killed. and that gives us an overview items such as you see such data collection is a priority in gemini southwest to a hey, a sewage way. because the testing another ineffective system, movable flight and choose the police and remain securely in this green container during floods and heavy rain full. the rest still easily find the way to the bank. and an electronic monitoring system registers each visit to the fences and we have a total of $9000.00 demand holes in july. and every 2nd one contains police. and this will be more than one. before we introduced the system we use to use around 900 kilograms of poisoned paint fun for now it's just for the key guys so well

below 10 percent inputs in technology as i'm looking right katcha. these initial steps seem promising in terms of tackling the road in tissue and reducing damaging effects on vice versa. the environment hi summer. the heat can be especially impressive in urban areas. small animals attempt to cool down by panting or lying on cool floors. we people sweat it out, or turn on the air conditioning. if we have one and many do, but air conditioning use, it's a lot of energy and that's not the only downside. we take a look at singapore, the air conditioning units, are you big? what is in singapore, to help cope with the hot and humid climate. but these appliances are part of the problem. because they contribute to rising temperatures. luigi them yolanda studies

architecture and sustainable design. with the help of a thermal imaging camera, she's identified a vicious circle as well for a small key to the as well increase the higher the max. so it's not what further exacerbates the situation in single port is the rapid growth that's underway. there are more and more residents and more and more concrete. in recent years, temperatures and singapore have risen twice as fast as in the rest of the world. data set, good on, has lived here for years. but dealing with the heat every day is challenging. even for him you can see right. when you saw me even walking in and i'm still little bit was fighting. yeah. it's actually 10111011 o'clock in the morning is over cost and the humidity is picking up. data stick around is an architect and box

and list affectionately known as the plan which is weapon against climate change. this as simple as it is affective vertical green spaces on the walls of buildings. you can feel when i'm standing here. just close beat by right. i can feel these heat reduced significantly because the plan's up with the rest, the right or aspiring and photo synthesizing. when the plausible to synthesize to release oxygen, and they actually basically picking away my compound off site for the synthesis. so when you have got that biochemistry going around in the city, you'll realize that c, o 2 level drops, the immediate heat actually drops. and that makes a big difference. 30 different plants species are growing on this wall. a sophisticated irrigation system provides the necessary nutrients. workers trim the greenery twice a month in the long term. it even has financial advantages. yeah, conditioning cost insight is actually cheaper and lower. so that's costs your saving as well. so spending a few dollars to spend a few, a few dollars to save

a few $1000.00 is actually a very good business. new e, junior orlando, shows us another building that illustrates what a difference green and we can make. this facade is partly covered in plants. the other surfaces, steel and concrete are completely exposed to the sun. the difference in temperature is a whopping 5 degrees celsius. but singapore can't combat rising temperatures with greenery alone. it's also promoting sustainable buildings and allowing more spaces in between them. the new university, for example, has solar cells on its roof, hoping insure net 0 emissions. professor vater selected on teach us here the shows us how a simple ceiling fan is enough to keep students cool. it's all very open plants allowing a gentle breeze throughout the premises. the building is actually quite similar if

you're going to forest this, i'm treat some buildings to a very tall, some trees. there's every, it's all the different may as well. so trying to bring back for us architecture and the city escapes is very important to try and involve designs of the future as well . so nature based solutions are part and parcel of that and they look spectacular to this hotel and the center of singapore has won awards. it leaves and reads with flourishing green terraces and gardens single pores subsidizes sustainable architecture and is pursuing and vicious long term goals. 1000000 new trees are to be planted by 2030 and so plan is to have so many parks that no one will have to walk more than 10 minutes to be surrounded by nature. for this project is called cooling singapore. the researchers have programmed

a digital twin of the city. this allows them to stimulate cold temperatures can be lowered with individual projects. a thermal image showing to these daily temperatures and single port is shown on the left. on the right, what it would look like if all buildings were energy efficient and sustainable, the whole city would be $1.00 to $2.00 degrees cooler. single power sees itself as a driving force for southeast asia in the fight against rising temperatures. and is investing billions on like other developing countries. however, the wealthy city states can afford to do so. one of the big problems with cities is that the many sealed surfaces like concrete and as far as the store heat. and when there is heavy rain, the surfaces stuff, the water from infiltrating the soil, that's one reason why many cities are starting to plant tiny forest. these micro

for us can help bring temperatures down, store water, and much more new stuff. and she also has a dream. he wants to grow many primeval forests, known as tiny forests across gemini. after raising 14000 heroes through the crowd funding, the forest scientist and his colleagues planted the 1st tiny forest in the gym and state of brandon buck. a total of $3000.00 ground cover plants, shrubs and trees. all native species, then sleep sound too, they compete for the night. and so for a relatively quickly, japanese pump, so steel, logistic, keira, milwaukee developed the tiny forest concept in the 1980s. the best small primeval forests, rich and species wild and resilience, and particularly suitable for cities did i have been for month by spilling with cobra and roots a few examples. and that allow me

a walk through the forest could potentially developed into a very dense green movement of buttons for sheet and various shrubs, climbing clumps up to really told trees at the bank. so that after a really short time, you have an impenetrable primeval forest. or a rep to cover fundings, and so the supervisor and that's, can have a cooling effect on areas suffering in the heat stuff on shel phillips to natural processes occurring in native woodland. to understand what tiny forests need to strive, the fear of the i'll leave the by a mass that drops from the trees. we tried to compensate for in the 1st few years by laying down this is drawer or top talent would for us. and it has to be done with the aim is to ignite a price. tesla's fema, we provide the forest system with what it would normally develop itself. they've refused to case. i'm a task force and then after a short time and you can leave it to it's um, devices, but lots of the stuff for it. so it doesn't need to the boy as we build up this

toil life and this human. because if the from the stopped on the phone, i depend on the shelf or, and his colleagues in which part of this field with nutrients, according to me, a walk he's concept before planting the trees and shrubs, they left another part of the soil as it was so nothing matched. would that be a difference? a 3 d scanner shows how the plums, the developing, or on the results of class. on the right hand area where the soil was prepared, there is far more vigorous gross sounds of if any of this is the very most vital corner we have, it's also dental vision. the former street x that wants to gone are in susie and them for tiny forests throughout gemini. he's now on his way to a hospital campus with a piece of wasteland which will be turned into a forest. the soil has already been prepared as much to do before the fuss trees go

into the ground stiffened shelf and mixes native ground shrubs where the pumps on trees, seedlings into planting bundles, hospital stuff, and patients interested policies and a bubble children. a will be invited to the planting day as a specialist, so this is a tree. this is x rays. now, when we come to treat them and we make the whole deep enough for the rates to fit into the sea, we want to see roughly where the root and that's, that's where it should be in the ground. so what do you, what's in alpha? and was 1000 and buttons. i'm located in the fish differential. so tiny forests complaining, important educational role teaching the next generation how to pronounce a green powerhouse amid the assaults and concrete. that's important because tiny

forests have a lot to offer cities in the face of climate change. they clean the arrow of particulate matter, sofa dioxide and nitrogen oxides and boast, 18 times more bio diversity than in natural mixed forests. surface temperatures in the form of shade can be up to 30 degrees celsius lower than on sealed surfaces. and they have a cooling effect on surrounding at temperatures to dropping them like 2 to 3 degrees. really excited. so what about most we can the far a slight, the wrong house. think of it as a rule of thumb. the tiny forest is voted for another 2 to 3 years and then no longer needs any outside inputs. that kind of inputs from the arkansas and lots of time and commitment went into preparing. i'm pronouncing this 1st tiny, far as to you, but of to just full months. it's paying off the form of waste and is already offering up. it's fast delicacy, lunch,

whether they're caused by heavy rain or rising sea levels, they can have a specially serious consequences in cities. if the water can't drain away, houses in the streets, get flooded. to protect itself from this threat by is caring for its mangrove forest. then it says built a multi 1000000000 euro flood barrier, and other cities are water proofing to go from bad sweeten sometime in the future in just 5 minutes. that's more than 15 liters of rainfall per square meter. the volta account drain away fast enough is this heavy rain could look like one day in the swedish city. the fortunately this was just a simulation for the people have gotten back this kind of disaster scenario. it's hard to imagine that the city is already preparing for an emergency go some bucks.

it's right on the waterfront sea levels here in the north of a so wrong thing due to higher temperatures and melting places. and extreme weather events are becoming more frequent. combines this poses a serious threat to the city, says deputy man car in plato. we are the most vulnerable of the city in the sweden, in fact, because we are expressing from from 3 directions to have the sea levels and the storms coming from the west and pressing up the water to the city from, from the sea. and we have uh, the, just the river we chose, so we'll have a rise senior water level and the rest ending us from that side. and also the heavy rain falls floating and downtown got some bug is knocked on, come on even now. these images are from august 2023 realistic visualizations, if these potential scenarios could get the right people to pay attention and take

action. that's why go from bugs is created a digital twin, and it's based on real data. in the 1980s, the city become compiling all the information that code about soil conditions go through and sewage pipes on the right and rail network for them. for me, at the time we have, every single tree is noted and essentially accessible data base with this page and height. we can read every data within the city. and we also have parts of the data, our open data into the community. actually we have the, based on this data, eric sean son's team, recreate to the city with all its details in 3 days. the power method, even the rates have the right shape and even with the lease or in the right place, my working with this power metric modeling, we can change the safety and visualize it in several different ways. so that's

a very strong mechanism in the date of when you're just working with pattern metric canvas of the station. the university i'm science center depicts what will happen in a sea level rise is even faster. and also the various meshes that could protect scuffing bags in the city center from the volta. these yellow lines represent load holes that would hold but griffith, real tough of advice. and in fact, some of them already being built lisa, extra as the climate struck to just for the government back city planning office. here at the practice, can we have a we have a race to the wall next to the shore to protect the the city. the width of the, on the inside of the was the height of the wall was precisely calculated in advance . this is just one measure to protect the city from rising sea levels. the digital

twins could be good for the city to show all the measures that needs to be done and why it has to be done. and i think it's a good tool to visualize for the positions and for our citizens and to show what could happen to guttenberg in the future. the problems are known now it's the case of making the right decisions. for example, big looks could be constructed the seal, the city of from the state during heavy rain especially created open spaces, couldn't show that the water collect small quickly and can see poway like here and then new development. terrific. lisa area contain 500 cubic meters of water. when the heavy rain is coming, it's 10, collect to water here and save the building. some of the housing center, everything around the greenery head also helps to provide

a healthy oven climate. do you have a science question? then send it to us as a video, text or voice message. if we answer it on the show, we'll send you a little surprises the thank you. so come on. just ask the this week's question comes from klaus w, from pato, born in germany, the, is the sketching lights, or is it gaining weight? the box on it weighs almost 6, set, tv and kilograms. this can be determined funny accurately, with the help of satellites under mathematical formula. the weight is constantly changing. it has enough gravity to retain its atmosphere, but in the days of gases,

gravity is no longer sufficient. i'd like to elements such as hydrogen and helium disappear into anxious space the the ast floozies around $96000.00 tons of weight this way each year the radioactive decay reduces the weight of all planet to this convert samantha into energy which then escapes into space as radiation, this happens mainly in the interior and the rock such as o tonight's near the surface. radioactive decay accounts for around 7 tons of weight loss if we do one space, travel also low as the weights when we send rockets into space to transport satellites and exploration robots to other select steel bodies. the building

material that these high tech machines are made of comes from us. the space exploration lightens, the planted by around a 1000 tons per year. but the us is not just losing weight. it's also gaining. it's called the thanks to a constant trickling down of duff from out to space. this cosmic dust comes from an asteroid, orbiting the sun behind moss and a bubble from comments. sometimes we can even see the specs of dust shooting stars and every now and then larger chunks crushed to the ground as meteor writes for. and if this adds an extra $16000.00 tons of weight to the us each year. so doing the math, we end up with a weight loss of $81000.00 tons per year, which means the us is getting lighter but only by a tiny fraction of

a percent. almost nothing the and it's all from us this time around. thanks for watching. we're back soon. see you then, and in the meantime, take care the

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you're watching the dr. news lar, from the israel just phones. let's see. what are you off to the u. n. and to, with a saw me on the, on the blacklist the violations against children is there as and back to the, to the un voice to soften to talk to us. but un quotes that the long, fat and a stomach she had in a thoughts coming to the board and states embellish as failing to protect children . also coming up denmark's prime minister is a tax wise campaigning and copenhagen ahead of your can follow me in the election falls off of speed or violence against politicians of pulls open infantry across the.