under cultivation are dwindling. the average size of a japanese farm is just $1.00 hectares, which makes it difficult for farmers to make ends meet. that is why there are hardly any young people farming was the average age of a farmer being 66 years old. cooperatives are formed in many places in order to be able to far more effectively. but the increase in natural disasters is also causing them problems in the world. to avoid being held hostage by these changes. the farmer was inventive in all of this is my aquaponics system, he proudly explains. and his small greenhouse, he is trying out a new form of agriculture. aquaponics here, fisher, bread and large tanks, easy money has 250 sturgeon's and his facility with

the fish excrement is pumped out and used as fertiliser. her various vegetables, the water purifier by the plants, is then returned to the fish tanks from rice farmer to modern. i could punish a farmer almost all vegetables thrive here all year round and are independent of climate changes. the greenhouses even withstood an earthquake. the neighboring farmers have already suffered this year. it rained too much and their plants did not get enough sun. i kid out. over can still carry his harvest to the market and dreams of an even bigger plant, such as this one and this year, never back district in berlin and the grounds of an old industrial complex

greenhouses professional growing in the middle as the city groups of visitors from all over the world come here to learn about the goings on. inside. this is also an aquaponics farm, but on a grand scale, the current product, capital city grown put the excrement to fish bread in these tanks. the fish that is marketed in berlin is of course called capital city perch. with one thought we want to produce where people can still so we don't have long supply chains or long cold storage times. and we have a much better c o 2 ballots. so it's why i think our fish, the capital city perch is the freshest best you can buy here in berlin. the principle is as old as the hills. the water that is polluted by the fish is extracted and used as manure for the plants. and has been used this way for centuries in china and by the mayans of central america. the plants grow faster on

shelves, are in raised beds in these rooms than in a natural environment. the young entrepreneurs produce $1500.00 basil pods per week for a supermarket chain. so won't take long before the costs for the 1400000 euro construction are recovered. from the 7.8000000000 people currently live on our planet. in a mere 30 years, there will be 11000000. more and more people are leaving the rule areas. and according to united nations study, 2 thirds of the world's population will be living in cities and 2050. so more of these fires will have to people, especially in asia. they're megacities already extend over huge areas without any agriculture. more plants and more greenery is needed and the cities urban planners face

a new challenge. the inhabitants of mega-cities not only have to be supplied with living space watcher and energy. they also need room for growing food. the disorder architect, kustok in an orphan and his staff are planning huge presidential and office complexes and almost all the world's megacities. and they need to make them attractive to live in dallas, and we have to deal with overheated cities. cities are significantly warmer and hotter and the surrounding areas stray dealing with cities that are not only dan, so to speak, but also sealed. so no offices there is little contact between the environment and the awful with correspondingly negative consequences due to the influx of people and of a grounding by the physical about a fault. it is no longer possible to ignore this problem. so the idea of revegetation and of green architecture will plan major role in the air traffic to

war from the ending of the war for no. this residential and office complex in singapore, as high as the berlin television tower is an example of that to sort of architects work. 20000 people live and work here. a small town in a single building complex. in the middle of it is a green heart, 350 different species help to provide better air and a better climate. other things in the room for this is certainly not the solution for normal rural, central european areas or it is the solution for high density locations. of course, if you plan to create a green area, you can also use it to produce food. so you have to have facts of life that you have to shading a factor, and the fact that the food is produced here. so you have the benefit of oxygen production. and an additional advantage is that if the project is grown here,

you also save c o 2 due to shortage transport roads. what we are going to stop, we are green areas and not just for recreation, agricultural producers, grain, food and high rise buildings, or on roofs next to huge office towers. it's really, i wouldn't dismiss it, although it does, of course aim bizarre because i think that from a central european perspective, it's difficult to imagine the density and intensity is one of the difficulties. many of these cities will face in the next 50 years. what comes next is to achieve this with a quality that enables the people to live healthy lives there on a permanent basis for us. what sounds like a futuristic dream is already reality and asia. but also in europe, more and more people are moving to the cities and the transport supply chains for food are getting longer. in the center of tokyo, take into the main shopping street of the metropolis home to the large japanese

corporations and law established institutions. i have rice field in the middle of it on the roof of a high rise building. i psec you brewery grows the raw material for its rice, while here in japan, sackey is not just an alcoholic beverage. it is an end to spencer part of the country's culture, just like rice, which is why sackey and rice belong right in the heart of tokyo for this program. it is also an experimental field for new her. i had to use the roof of a high rise building as an agricultural alternative that body in the beginning, they didn't take us seriously. no rice would grow here. it's much too bright here at night with a cut on the roof. it's much too hot. but our experiments have been good and we're harvesting more and more. the rice grows well here. i think it's right that in

japan they are looking for different ways to grow rice and vegetables. it's a challenge. and after all, the rice is part of our tradition ideal. let's start there, get there. not only on each season, the group produces 50 potholes of sackey from a small rice field on the roof of the historic building. hope it was felt in the center of berlin. right next to the museums and transfer as a restaurant. deal limited to class cabinets are not just part of the decor. i inside grow herb's and salads and it's really start up based in berlin has placed these plant cabinets in various restaurants in the city, as well as in the stores of a supermarket chain. they function similarly to the plant factories in japan and ensure that the project is fresh on the table.

there are 50 sets many greenhouses in berlin alone. and about 200 already distributed throughout europe. 2 square meters of space in the plant cabinet corresponds to 250 square meters of regular farmland and less food is waste in the kitchen because you only harvest what is necessary for the dishes that guests have ordered the office space from our farms. 2 or 3 times a week. we don't have to watch it because it doesn't have any dirt. it has just water it wants. so it's perfect for, for the cook and also for the guests. this is, for example, is this 1st of all, it's this, this is very hard to get in the market. so you can see that it's super tasting. and the fact that you just, you are harvesting it and putting it straight into the plate. it makes

a huge difference. but the other thing, and i think this is the most important one, is that we have access to the flavors and to plants that you cannot get anywhere. for example, this one is small stuff. and it's something that you cannot get in the market based really like must start, like, sharp and spicy. admittedly, this kind of special preparation is more for the enjoyment of a metropolitan minority. presently these greenhouses are not your plan for mass production in germany. at least the lettuce here doesn't travel far to be put on the table. factory plants grown under artificial sunlight without earth and with little watch or an important step for the nutrition of the future. and the challenge for conventional agriculture will work with nature. if you look around here, marx are singing, the insects are flying around me,

but that isn't the case in these facilities. and i believe that this is not what you want in the future. it's not nature, it's just an artificial product to come. i just can't imagine it would, but it has nothing to do with my eat. those as a farmer. army farming is having an area of land here where something is growing that i can take care of when the artificial farming goes against the philosophy of what i want to represent with my soul as a farmer. but do we have another choice? classical agriculture alone will not be able to supply the growing world population without the help from the oratory for much longer with plants that develop in a controlled way without the use of fertilizers and pesticides, and with less watch or soon there will be a world population of 10 or 11000000000 people, we can't yet imagine how big the city is mostly tom. and at the moment it's almost considered progress if you can successfully cope with overcrowding at all. it is an essential part of 21st century technology that we achieve this. because if we don't,

all survive on the planet may not happen. what do you want? do you want to produce? is such a way that you have some optimal yields and you use, you need to use a bigger surface. and that means that you have to destroy nature, or you want to have your optimal yields per square meter. so my opinion is that we use our agriculture fields in such a way that we optimize the growth in order to save the environment. and our research is still just starting. however, in the coming decades, cities throughout the world will need to host critical agriculture as safe, clean and sustainable projects. if we are to prevent food from becoming scarce

and science rather than fiction for a long time, an automatic facial recognition. cameras everywhere have scientists identify us in seconds from our facial features. the software comes from dresden, for example. it's developer showing us the potential of the technology to see next

morning to the future hold for the mortal danger of the art. no thanks to the alabama dust. the radiant dog story of nuclear energy that is splitting humanity in 45 minutes on d. w. closely carefully. i don't know if this city needs to do a good job to

discover the world to play subscribe to documentary on the tube. did you know that even bees are being factory found? but fortunately, there are alternatives. we look at the dilemma of sick facial recognition. what's more important, public safety or personal privacy. and is the world going from bad to was not really, but why is our brain so sensitive to bad news that and more coming up.