praise education is still a privilege. tardy is one of the main causes some young children work in mind drafts. instead of going to class, others can attend classes only after they finish working with millions of children over the world can't go to school. we ask why? because education makes the world more just make up your own mind. d. w, made for minds. nature is beautiful and useful, but are we useful to nature? what plants should we grow in our cities to support local ecosystems? how can we keep snails out of our vegetable gardens without harming them or other creatures?

and how can mushrooms help us give something back to nature after our death? all that and more coming up. ah. hello and welcome to tomorrow to day the science show on d. w. and later like this is full of activity, flowers blossoming. butterflies flying and bees humming. scientists have proven that farm land meadows serve as a source of food, a habitat for pollinators, act as carbon sinks and help to replenish groundwater. and they say that's especially true when a wide variety of plans can be found there in large numbers. but doesn't matter whether the various plans on native species or come from other regions

for water to biology is doing any garden center when they don't even have gotten they are looking for what's on offer for gardens and balconies. junior, senior and in my style are on a mission to safe native plant species. the idea about concept is that we want to harness the enormous potential of the millions of green areas that we have in germany and other countries like germany. so we have gardens and lockman sidewalks balconies. it's all spaces where there are people living intimately with these spaces where people are interested in planting things in the spaces. and what we want to do is redirect those efforts towards native plants that are threatened at risk of declining already are declining. it's mostly native plans that cultivated the urban areas around the world. it could help

to slow the decline of biodiversity. but why is that soak as a native plant so important? i currently recount 13000 non native plants and the entire plan diversity is 370000 plants. so the only supports neophytes. so the non native plants been, we only support a small fraction and these plans are already managed very well to disperse. so they are not addressed. where as many native plants are at risk in germany, around 30 percent of native plans are endangered. landscape architect claudia fig. until you go works with trees, shrubs and flowers. in her experience, customers don't usually ask for a native or exotic plants. they're just while hardy plans that are resistant to disease and easy to care for. and what does she prefer to plant? here?

real naturally. sh sean, they are starting out of ours. we make our selections based very much on the design, depending on what people want, hold merchandise, lloyd. so 1st we look at what people want, i think. and then we look at the location by that because they are all really different or if one of the functionality, then we choose the right plans. i don't question. for example, they can tolerate shade or loans for belie tonka, long or species that are able to cope with less water d placement venue offered to let call. it boils down to a mix of native and non native plants. when people do ask about native plants, they usually mean plans that will support insects and birds, se, se, claudia faking playground. and he, in the garden center, they are a lot of insects. but our party latest more attracted to exotic or native plants. ah, less it evolved conasauga. as of us we have,

we can't really say exactly what we see here is that insects like going to non native plants lawanda devlinson because sometimes these plans filled a gap when native plants are taking a break, i'm from london. i know, pose, i'm laying on los high concept that probably makes most sense is having both variance in follicles, our native species supplemented by non native ones. mission, i can think of different london all that class ever acts in the light station, natural history museum. he is a specialist on invertebrates, which includes insects. the museum has around 300000 in its collection. does he think non native plants are a problem for native insects? when fetishes as chemical bloomed, and it's not a problem when a new species appears, division. and the question is always how they fit into an existing ecosystem whose home and that is very difficult to predict in advance line, of course, because in

a new ecosystem, they encounter many species of animals and plants that they are not prepared for sized. yeah, so we don't know if there will be negative or positive impacts or no impact at all or kind of looking up. and what about wild beasts? because combo of unrequited, that depends on how good they are at dealing with changing flora. well, of course, there are generalists among wild bees in, for example, many bumblebees can use a wide variety of plans for food. but there are also many beeson bumblebees that cannot. they depend on a small number of plants youngers, and when those plans disappear. so to the bees, philip dorski is also a biologist, and he too, is concerned about protecting biodiversity. what looks like a garden where nature has been left to its own devices? it's actually the result of gardening, that emulates nature. but all the plans he had primarily native species liking must

out until cnc gov wants ah, was excellent disciplines. mm hm. so the non native plants we have here are mainly crops slung, for example, we have situ on pepper ice pins, which can be used as a spices to go for. and we also have fig trees as to why fi and we harvest the fruit one. so t, jaime, flour native plants are primarily for the animals. so like these wild areas here by the pond, not one on floating job, it's most pres, young ties are but of course one or 2. there are also native plants that we use. like ment i spoke to you in windsor. ah, the mix of native and non native plants seems to work well for many animals like these dragonflies. bes, eliza, a natural garden has many advantages, but it is a lot of work. it gardeners need to be knowledgeable about the plans. it must our

inches and seger like the natural garden, but doesn't live up to the idea of god that supports late of plans and ecosystems. i think the best ratio is probably to have between 10 to 20 percent non natives new fights. um and the rest are 80 to 90 percent of native plants species. and especially for on the near fi it's, it would be desirable that they kind of fit into our ecosystems as well. so that an insect pollinators recognize the species. they're still one big sticking point, according to research, as people's perception of what constitutes a beautiful garden, needs to change. but maybe it's helpful to know that a garden with such a mix of plants, could better survive climate change. even

a well planned and planted garden that's equipped to combat climate change may be no match for snails. and no wonder worldwide. they were over $40000.00 species of snails and they can be found everywhere in the sea, in fresh water and on land. and they love to eat where the native plants or exotic species snails love them. all. so do we stand a chance of keeping the most of our gardens now that's what you call moving at a snail's pace. a snail this big travels at 0.003 kilometers per hour. that's just 3 meters an hour. and it's carrying quite a load. the shell on its back provide shelter when it's too cold or too warm. and this hole in the front door allows the snail to breathe. their eyes are also fascinating. an antenna extends outward like

a telescope. though the eye on top can only tell light from dark, but snails have an impressive sense of smell and can tell when something tasty is growing in a garden. snails not only love to creep around, they also love to eat a lot. if they consume their weight in food every day, their veracious appetite often causes conflict and makes them the bane of every gardener. ah, oh ah, but all snails are not the same. those with a shell help to keep gardens healthy. they feed mainly on dead plant and animal remains playing a key role in homeless formation while cleaning up the garden. at the same time.

only slugs, essentially, snails without shells are considered garden pests. like the spanish slug. how can you combat slugs? most methods focus on killing the intruders, but that affects both slugs and snails alike. household salt is especially brutal slugs die painfully from dehydration and beer traps are so attractive that they laur snails from neighboring gardens. even organic slug pellets made from ferric phosphate can be harmful to snails, natural enemies, such as hedgehogs, mice and birds. it all depends on how many sales they eat. what's the right method? covering plant beds with dry material is one alternative to gathering up. been relocating snails each day. sawdust egg shells,

sand ash or dry coffee grounds are tough to slither across. slugs like it, damp predators like runner ducks aren't especially effective but labor intensive option. a one to one mixture of chili powder and cinnamon works to at least in countries where snails aren't familiar with the scent of cinnamon. it keeps them from smelling. let us when she leave it and once it is lug has tasted a plant with chilly on it, it will never go back and word gets out as quickly as will sprinkle the mixture over the bed between put some on the leaves, some on the soil. it's non toxic, but i'm appetizing for slimy lettuce thieves. sales are a minor problem compared to the major threat posed by climate change wold why droughts and dry periods are increasing often leading to crop failure. but the long term arid ground also poses an existential problem from micro organisms,

plants and animals. and therefore, for us as well, much research has been conducted to find remedies. in switzerland, for example, they're looking for ways to make the best possible use of water in agriculture. water is a precious resource, philipo nay. as a researcher at the swiss center of excellence for agricultural research or agro scope, he has been ideas about how to preserve water is your bhaskar honorably important goal is finding the right amount of water up so we can use as little of it as possible for irrigation while still achieving the best possible while it was a blue flat band holler may yo object, if god he doesn't, monet is working on a drip irrigation system. for orchards. each tree needs

a little more than 12 leaders per day and using the right amount in the right places helps conserve water. you both saw it reminds me of an australian publication which demonstrated that a drip irrigation can reduce water usage by 50 percent day discuss. i called course old or other studies may be less optimistic, but all of them come to the same conclusion. drip irrigation is an efficient method of distribute water to fruit trees. especially when used in combination with ground sensors and 2 separate sensors at different depths. and the ground measure its moisture when the song gets to dry, the sensors send out a signal indicating that the tree needs water. the signal triggers the watering system up to 3 times a day. monet has conducted trials on 30 different fields and he's developed a fully automatic irrigation system. it prevents waste and guarantees high yields

the sales cova. we're in a part of the orchard, is that for experimental reasons? like we haven't irrigated at all? is it get to alsco was occur leaf wasn't we observe is that the fruit here is not only small and it's not the best quality cali. d, a preserved in terms of 1st choice that would cost the grow or tens of thousands of francs per hector in income de moscowitz at that deal de over new polar. the product of the drought is noticeable between the trees. the dry summer has caused major problems with these trees have died if they hadn't been irrigated opa vehicle via the tell you how long a tree will survive without water. in fact, a tree has mechanisms that allow it to survive without water healing, belma the seal of evil. what without water they stop growing and can't thrive, quasi pris develope the growth of the shoots and the branches gl will be completely

starved was as will the growth of the fruity culprit more electricity if we so it's the yields the quality of the production that is affected by the lack of water g at the 50 by horrible among the door. aside from sam probes, there is another way to measure and trees need for water. den durometer is a research project by monet's colleagues, measures the diameter of the tree trunk during the course of a day. the trunk expands or contracts. when the sunshine's, the tree loses water and becomes thinner when watered in the evening, it expands again over night. if a tree doesn't get enough water, it can't regenerate and experiences what's known as water stress that has a negative effect on yields. the researchers irrigation system is faster and more precise and also more reliable than it should rule when the irrigation is well

adjusted. it ensures that human errors won't occur e, it's often valves that people forget to close, that lead to waterways toward one of these all bicycle. now li, as water becomes a scarce commodity around the world, water saving technologies like these are more vital than ever. mushrooms have been around for longer than humans. the oldest fossil fungi discovered by research is, is some 700 to 800000000 years old. mushrooms pop up everywhere and can do amazing things to if their qualities are even of interest to undertake his mushroom . my sylium can be used to make things like bricks and houses that are really stable. and fun guy can decompose organic material, including complex life forms. ah, a lab coat,

rubber gloves, safety glasses, some wood shavings. and fungal, spose from the laboratory. mix them together, add water, and weight that so bob hendrix needs to do to grow a coffin like tango. david, as a brother, david edinburgh, and gretta tune berg would be fans of my mushroom. my celia coffin, the st. it's an invention for folks who think about the generations to come at home now who after their death, want to be one with nature and had reached the soil as compost will not contaminated human combust. is that a disrespectful or brilliant idea? the young industrial designer invented his mushroom. my cellular coffin almost by accident. but studying architecture, he dealt with living building materials. since my salia can be used everywhere, labriola slithered low. my sylium brings life back to the soil so that grows fast.

it needs no electricity. heat nor light, in fact did even absorb c o 2, while it grows was all mix of the more people who are buried this way. the better it is for the earth that's fundamentally different to our burial rituals to day or put it up order. in just 7 days that my salient grows in a pre formed mode, forming a living coffin who surface feels like a velvet cushion. the coffin is then dried to stop the growth. the fungi, then lay dormant. the coffin looks like a styrofoam box and is just as light, but it's a completely natural product. that is the inter saunders of what special is the emotional perception when you touch it. so it feels good hobo it's warm, soft and light but also very stable. yeah, so the corpse inside can be almost 2 meters tall and way up to 200 kilos.

for the burial, it's placed on a bed of fresh moss. to speed up the decomposition process. the moist moss comes into contact with the dried my cellular, bringing it back to life. more than 100 people have already been buried in my cellular coffins in the netherlands. last year funeral director john von cast her up. so the 1st living coffin for an 82 year old woman the, my sally and based versions cost $1500.00 euros cheaper than conventional coffins. a ding needed not to man. so i don't think people choose a my sylium call them for financial reasons. my rather ultimately want to send a signal to the rest of the world. we almost do our part and only leave a small carbon footprint behind on this climate and also beneath ortho lab. because around the world, some 160000 people die each day and they leave traces behind,

not just in the hearts of their loved ones, but also as toxic substances. one of the most resource intensive burial methods is the classical christian ceremony with a wooden casket each year thousands of tons of wood steel, bronze, and copper are buried under ground. cremation isn't much better. in europe, around 70 percent of people now choose to be cremated. however, this produces harmful emissions and toxic ashes at the cemetery, it can take up to 10 years or more for a corpse to fully decompose in a traditional wood and casket. by contrast, with a living coffin, it takes just 2 to 3 years. and at the same time, the, my cellular release is nutrients into the soil for new plants. so word about this, dutch invention has spread quickly. more than

a $150.00 funeral homes took advantage of the opportunity to learn about the idea of organic barriers from bob hendricks. himself. he certainly convinced funeral director york few vague from here by the sat on taught with burials, deaths, and mourning like logs and sustainability is a really big topic came on. it's also one that's in a huge boost in recent years. when you can, i think it will become even more important toys because the people who will bury us, you and me, are the ones who are on the streets demonstrating with gretta every friday. mitigate office austin in product i months via even if some people aren't yet ready for more sustainable burial culture, bob hendricks and other funeral directors expect that soon. many will choose living coffins as their way of giving something back to the earth.

that's also part of the circle of life. they help to spread plant seeds, they eat insects and keep their numbers the tank. some even thing quite nicely. and they often do that from lofty heights. power lines are a popular place for flux of birds to land, which seems rather risky that prompted villa hot, hey, messiah, to send us the question all the way from colombia. why aren't birds electrocuted by power lines. busy power lines offer birds are lofty landing spot, but they've chosen a high voltage look out more than 100000 volts flow through the cables. by comparison in europe, normal power sockets have just 230 volts. that means the voltage of their purge is

more than $400.00 times higher. and yet our feathered friends don't even notice. nothing will happen as long as the bird touches only one cable. no electricity flows through the bird because 2 neighboring points on the table carry very little voltage. birds can relax and enjoy the view banks to the principle of electric circuits. they function like this. let's use a single wire to connect a battery with a light bulb. nothing happens. electricity doesn't flow through the light both until we take a 2nd wire and complete the circuit causing it to glow. when a bird sits on a power line, it's like a light bulb with just one wire. nothing happens.

because power lines are like positive polls, electricity can only flow when they make a complete circuit together with the ground. a negative pole. that's the reason power lines rarely pose a danger to smaller birds. busy but power lines and transmission towers can be troublesome for larger birds. busy like eagles, storks, geese, and even crows room every year. thousands of birds die from electrocution in germany alone. that can happen when they touch 2 cables with their wings and create a short circuit or when they touch both a tower and de cable lose the circuit is then complete. and high voltage electricity flows through their body. this dazed duck appears to have been one of the lucky ones. it hopefully just got

a minor shock. if i was let is read. why on a plan with if you have a science question, send it to us my video text or voice message. if we answer it on the show, we'll give you a little surprise as a thank you. come on, just a that's it for this edition of tomorrow. today, the d w sign show. it's nice that you could join us until next time. good bye. and remember to always stay curious with

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77 percent. we talk about with the 7 percent in 30 minutes on d, w, y. oh. every jersey begins with the 1st step and every language with the 1st word, louis pinnacle rico is in germany to learn german. why not learn with simple online on your mobile ad? free chef. d w e learning course, nikos. vague. german made easy degrees. plato, a saxophone operator, who wrote her master's thesis on the potato, raring to read a, not a turn on. well, it gets more would that there was from there. he

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on violet pass and re imagined that these teachings, both elements to us. ah gandhi's legacy starts january 28th on b, w ah, [000:00:00;00] ah, this is dw news coming to live from berlin. the gunman suspected of killing 10 people at the dance hall in california is dead. please say the man turned his gun on himself inside this band to my shooting is casting