♪ village in georgia where warm water is now on tap thanks to the sun. in ecuador, entrepreneurs are developing ways to make shrimp farming more environmentally friendly. and we go to california to meet a woman who, despite having a job, can't afford her own four walls. with a gdp of over $19 trillion, the u.s. w was the world's

strongest economy in 2017. it's a country where dishwashers can n become millilionaires -- according g to the amerirican d, at least.. but isis that dream m today lie more than a myth?? accocording to officiaial figu, around 40 mimillion americans w liveve in poveverty. anand at the samame time, the t of living kekeeps on risinin the average monthly rent in the u.s. is $1500. and in major urban centers, that number climbs to $2500. those who can't afford such rents often end up on the streets. last year, over half a million people in the u.s. were homeless. reporter: when night falls, ellen penney's car turns into her bedroom. everything she needs is folded neatly away here in the back. she sleeps i in her car almost every night, even though she has a full-time job.

she works as a lecturer, teaching english literature at a state university. it's her dream job. she proudly completed her master's degree at age 50, but her studies landed her with nearly insurmountable debts. ellen: once i got in and foundd out how littlele i make and hw much work k it takes -- and i he a strong work ethic, i w was raised that way. anand now, being in a position living in the car? no, i'm not happy. no, i didn't think it was going to be like this. reporter: living in a car presents a number of challenges. ellen has to find public washrooms, places to charge her cell phone and laptop, and parking spaces she won't get chased away from. she feels let down by society's attitude towards her. ellen: they don't want to know, they don't want to see. not their problem. that, that angers me, frustrates

me, disappoints me in humanity in this area. and they don't know how well they have it. reporter: san francisco is a well-heeled metropolis. the city used to be a magnet for counter-culture, but that counter-culture has turned corporate. silicon valley is home to some of the world's richest tech companies. but not everyone in the bay area is living the dream. many people here are falling by the wayside, including the middle classes. extortionate rent prices are forcing professionals out to the cheaper, far away suburbs. some even live in motor homes, entire streets of them. these people have literally been kicked to the curb. among them is the roiz family, with three children and another on the way. the mother has been cleaning other wealthier people's homes for 15 years. the family had to move out of their apartment three years ago.

the monthly rent was $3000 for a two-bedroom apartment. they just couldn't afford it. delmi: we're staying here because my husband has a good job nearby. we can't move because we don't have any savings. what can we do without money? reporter: they improvise with the small space they have, barely getting by while the people they work for earn six-figure salaries, plus shares and bonuses. the enormous gap between supply and demand is driving prices up in the housing sector here, and normal earners don't stand a chance. lenny: no matter how f fast yu run, you always end up in the same place. and because our companies are doing g so well, google's hiri, linkedin's hiring, intuit's hiring, symantec's hiring. all these companies are hiring, they're hiring at a faster rate than we can get housining buil, and get affordable housing built. reporter: ellen isn't alone. six years ago she married jim,

who recently retired. but then he found out his pension wasn't enough to cover his rent. both of them sleep in their cars. jim is reaching the end of his tether. jim: this is not something that provides you w with a lot of sf worth h and dignity. you appear ok, but inside it's eating at you. i've broken down i think two or three times now, where it just wearars on you to the point youo into tears, because you're asking yourself, how could this happen to someone who's honest, hard-working, dedicated. and you know, i'm not the only one. i'm not the only one. reporter: for real estate agents like gary herbert, the housing shortage has been a goldmine. gagary: so here we have a two-bedroom, two-bath house, on an 11,000 square foot lot in

central los altos. reporter: demand has caused property prices to skyrocket. this two-bedroom house is expected to sell for more than $3 million. gary: this house will probably be torn down and a new one built. reporter: so they're basically buying a lot for $3 million? gagary: yes. it's a big, beautiful lot, it's in a great location, it's easy to build on, there's no trees in the way or things that can inhibit the building. so they can build their dream home here. reporter: and this is how the other half lives. ellen shows us where they keep their possessions that don't fit in the car. everything valuable or important is in storage, in hopes of better times. some things have too much sentimental value to be discarded, like the christmas decorations that ellen inherited from her mother. ellen: my mom died in my arms when i was 21.

that was back when i had a home. got to keep something, don't have them anymore. i don't have the farm. sorry. reporter: ellen is making notes for tomorrow's lecture. her car also has to serve as her workspace. the affordable housing crisis has been especially sesevere n the west coast of the u.s. california has the highest rate of unsheltered homelessness in the country. ellen: i've got to keep going, i don't have time to really be afraraid. i do that, , then i'll just become static. reporter: people like ellen are locked in a daily struggle for

survival. here in the shadow of silicon valley, at the heart of america's digital revolution, people are becoming invisible. >> i am -- > -- a globobal teen. jujustin: hihi, my name is jun bosman. i live in hillbrow, a neighborhood in n johannesbur, anand i'm 16 years old.

i normally go visit friends, but now they stay too far, so i'd rather stay at home. i mostly play chess at h home. i listen to khalid's music at the moment. he's a ar&b and rarapper. his songs, at the moment, i feel i can relate to. one day when i grow up, i would like to be a lawyer. but at the moment, i'm rethinking that because i'm thinking of becoming an english teacher. because i see the inspiration in my teacher's eyes when she teteaches me. i ntnt to feel thahat wa i want to help peoplele. because without teachers, do y u think the great lawywys of today would be living, the great doctors? no, they wouldn't be there without them.

a day out with friends, playing chess, or walking around in the parks, having funny jokes. my fear is that, one day, we will go into world war because the e way we're living at the moment isn't the besest way yu could live.. we l live to fight insad off living to love. host: mangrove forests are highly biodiverse ecosystems found in tropical and sub-tropical coastal areas and along river estuaries. in the 1980's, scientists estimated that mangroves covered a total area of 200,000 square kilometers wororldwide. now, around half of them have been destroyed. if deforestation continues at the current rate, experts fear that in 100 years the trees will have disappeared completely. they blame the growing global

population and the booming shshrimp industry. reporter: the southern coast of ecuador is dotted with countless shrimp farms. around two-thirds of the mangrove forests that once lined the shore here have been destroyed to make way for them. to make the animals grow quickly, the shrimp farmers feed them two to three times a day. wilian: you have to fertilize, and treat the water and the ground. then around 60% of the shrimp survive. that's a very good result. but for that, you need fertile ground and good water. reporter: shrimp need saltwater, so the ponds have to be filled with water from the sea that'ss replaced regularly. the farms cause serious environmental damage. to prevent possible disease, the farmers give their shrimp heavy doses of prophylactic medication.

when the pond water drains into the sea, it's taken up in the marine food chain. studies show aquaculture is increasing the worldwide danger of antibiotic resistance. wilian: the medications are in the food that the shrimp eat. it contains a wide range of different substances. but we only use antibiotics when the shrimp grow sick and the disease shows signs of spreading. reporter: in the last few decades, ecuador has become one of the worldld largest p producs of shrimp. ponds are harvested every three months, and business is booming. along with petroleum and bananas, the crustaceans have become one of the country's top exports. last year, just under 450,000 tons were sent abroad, bringing in $3 billion. and exports are expected to expand this year.

diesel-powered aeration systems help keep oxygen levels in the ponds high. exhaust from the generators pollutes the air. now, not far from the old ponds, shrimp farmers are testing a new method developed in singapore. in it, the ponds are placed inland rather than at the shore. that gives farmers much more control over conditions. the ponds are smaller, but yields are much higher. after 25 years as an agricultural engineer, guillermo pina andrase turned a chapter. now he's pursuing a new career as a shrimp farmer. guilillermo: our b breeding med isis much alththier an traditional methods. you don't need nearly y as may antibiotics. and because of the roofs that cover the ponds, you can control temperatures better.

also, because the water isn't changed, you have more control over p pathogens. reporter: a pond like this yields around 80 to 100 shrimp per square meter of surface area, a lot more than traditional breeding methods. that's largely down to the fact that more creatures survive, and grow larger as well, significantly increasing their value on the hard-fought global market. guillermo: p people who try thm have told me that the consistency of the flesh is firmer, so it's better. and ththey say that the taste s exacy y the sa. reporter: and that, even though the shrimp are being raised in freshwater rather than saltwateter, an invavation tht allolows farms to bebe set p practicacally anywherere, ratr than only along the coast.t. but it takes the animals a while to get accustomed to the

different conditions. guillermo: this is where we put them when they come out of the lab. depending on the salinity, they stay here five to eight days. then we take thehem out and we t them in this tank. it has lower salinity levels. they stay in there for another eight days. after that, we put them out in the pond. reporter: a modern system like this costs around 200,000 euros to set up. the water is reused again and again, and the system is powered by solar energy. guillermo pina andrase is still testing it out. and soon he'll be selling his first harvest of shrimp. host: this week in our global ideas series, we're off to the caucasus. our reporter, maria lesser, headed to georgia to meet the resoururceful residedents of e

smalall village. nothey've ben n using larr ener t to heat w water, which s a knknock-on effffect. it protects local forests. rereporter: at 6:30 a.m.nanana gugurabadze fefetcs the hoho water, like e she does evevery mornining. the cow's ududder has to b e clcleaned beforere milking. a littlele later, as w well ase family's's breakfastst, she ms cheese. it requis s a lot patatiee. she can tell the cheese is ready when the consistencycy is just righgh everything here runs like clockwk, w witno time e fo brks. nana: as a housewife i have t ofof worto do.o.

i clean, make the e food, milk e cowsws, and lots o of other th. there's always something to do. reporter: nana gurabanidze is 60, , and was a nunurse for 30 years.s. she liveves with her h husband,, daugughter-in-law,w, and grandchildreren. nana: i alwa n need t wateter, i'i'm gl we hahavehis system. rereporter: they r receiveda solar-r-pored wateter heater fm a local energy cooperative. na: we sav up a biof money ansold a f things. it was mhusband o really waed this. it'suite expsive, buit is manaable. rereporter: was s he trying toe her daily y wo easier?r?

nana: i thk itit w mainly about saving ectctrici. but i cat say fosure. whene had thwood sto he had d go out llectiti rewood a m make re we ha enou. so maybe that d a a loto do th it. reporter: the cheeses s ready. nana gurababanidze is gogoingo take it toto the market.t. peopople here brining produce y grow or make at home, keke vegegetables, fruit,t, herbs,d cheese. mrs. nana s babare unpacked bebefore tradedecomes and buys the lolot. dependnding on the t type of ch, e pays between one eururo 50 and two euros s 50 a kilo. nana: you don't get much. buif y you le frugugal, you get by. wewe try to get t by o.

reporter: liza bachilava is also in charge of the housework in her home, , plus the fararm ane grandcdchildren. e still heats water ththe tradaditional way y on a woodod-burning stotove in the lg room she needs a lot of hotatater, and ereforore lot of w wd. her annualal wood supplyly cos betwn 20200 an240 eueuro in georgiaia, average inincoms under 3500 e euros a year.r. liza: we savave money so w wen afafford the wooood. but sadly, there are a lotot f families whoho don't managage. we're doing g betterhan n som. we can pay foror firewood. e poor fililies n'n't. reporter: ththe men collecect d from high h up in the foforestf the caucasus mountains. they're still allowewed to fel treeees here. gogita chikjkjladze is 27.7.

he comes here regularly. gogita estimates that chch and everery hoe in h his area consns about two o to three truckloads wood eryry year. gogita: if we e cut down trees ananywhere else wewe could cae rock slidedes, which a are dangs for r the residentnts. reporter: the forest might seem lush, but deforestation is rife across georgia. the number of trees being cut has to be limited to ensure long-term sustainability. currently over 12 times that number is being felled. ththe work of ththese two mechs isis helping to o solve the prp. they're cutting solar panels

the machine dates backo o world waii, bubut still w wks. they're partrt of the enerergy cocooperative. the syststems they proroduce r ouldld helto rededucwood buing,g, a therefore carbo dioxe emissis. the coopative haprovided solar-pored wateheaters re than 100 homes in the villllage. marietta letetodiani is a a 39r the system is being installed here today. marietetta: local reresidents w about ththe hot water r systemsd they know that banks are providg loloans r themem. we don't have g go fr door r door. people whorere intested d me to us. report: : marita hasaseen using the sysystem herselflf,d shshe's impressesed. mamarietta: c course,'ve e hd

one at homfor r three yess already. it'greaeat. itit saves moneyey and makes e housewework easier.. reporter: : nana gurabananidzs back frorom the marketet, ande grandchildren are awake. her son and dahthter-in-laarare atat wor so shshe s to looook after the chilildren. no time fofor a break. nana: i'm 6060 years old, , ai think my l life is almosost o. i'd do anything to give ildrdren a grandndchdren a beerer future. i hope t they have a b better . reporter: and hot water straight from the tap is a good place to start. host: this week on global snack, we visit a very special fast-food joint in berlin.

reporter: kreuzberg, berlin's melting pot, and traditionally, a bastion of subculture. it's also hoho to an excxcitig food scene. there's a a lot more to it thn kebab shops.s. now open f for nine months, goldies has become a popular local haunt. its specialty is fries -- fries with a difference. vladislav: we fry them either in beef fat or peanut oil. guests can choose. if they order a vegetarian dish, they're done in peanut oil. if they order a meat dish, they get t beef fat. regulars who eat meat get beef fat without asking. reporter: vladislav gachyn and kajo hiesl hit on the idea of deluxe fries while training as chefs. the fact that their eatery

serves 14 different sauces isn't the only evidence that they learned their craft in starred restaurants. kajo: this is our peking duck. it's pulled duck. we marinate duck legs in salt and sugar for 12 hours to make the meat as juicy as possible. then we braise it in the oven. we turn the skin into a crumble and then we shred the meat, so there are no bones or fat. we serve it with a hoisin-plum mayonnaise. and we fry the crispy skin i n fat. reporter: guests l love it. goldies goes through a ton of potatoes a week. along with peking duck, its most popular dish is fries with black truffle sauce. >> i'm dutch, so i have high standards when it comes to fries. i miss them in berlin. they're just a aren't as gooood

here. this is the only place where the fries are better than in holland or belgium. reporter: a portion costs betwtween 5 and 1010 euros. and of course, takeout is also an option. vladislav: we love chips, but it's not like we would kill for chips. we just wanted to fill a gap in the market. kajo: that's right. usually you just get chips on the side when you order a curry sausage or a burger. but we were thinking about things that berlin doesn't have, and we decided it was chips. reporter: and for the really diehard fry-fans, there's s evn video art devoted to these deep as ever, w we love hearing frm you, so drop us a line, global3000@dw.com, and take a

peek at our facebook page, dw global society. see you next time. till then, take care. ♪ [captioning performed by the national captioning institute, which is responsible for itsts captption coent t and accucur.

her et's join ferguson and interview with clinton. and welcome. this evening we bring you the first australian interview with since h her nton shockeked defeat by donald trum in last year's presidential lection and the release of her book "what happened?" hardly anyone anticipated lososton's stunning certainly not the candidate herself. she's been grappling with it since. watching as the man who openly derided her a as crooked hillll come u under scrututiny for