A City Built on Water Is Running Out of It
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- Опубліковано 25 сер 2024
- Mexico City was built on an ancient lake and gets more rain than London, but it's still running out of water. For millions of its poorest residents, getting enough is a daily challenge. To solve this critical problem, Social enterprise project Isla Urbana is capitalizing on the city's abundant rainfall with home-harvesting systems designed to help the most vulnerable.
#GameChangers #MexicoCity #BloombergGreen
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He’s my cousin! I’m so proud of what he’s doing, a massive difference for so many people!
I am an engineer, and it would be an honor to work with him!
Movement, as with water, is a guiding force and your cousin, a force for change, *will* make a difference. This story might be the story of all cities to come, hopefully this idea of naturally sustainable water usage will catch on and possibly mitigate the problems of water demands for future generations.
Liar, he’s my cousin! You imposter!
You're both imposters, I am him and I go by my new name Taco.
Senior Taco.
Your cousin is the real deal, when I was down there not to long ago I noticed the poor state of water treatment plants or complete lack of. I work in the water Industry and know how important water is and how to harvest it and use it. I'm glad to see there are people trying to improve upon things without asking the government for solutions. Anyway, it's going to reach a crisis point globally within the next 30 years.
This is the problem with poor city planning and paving over the ground so the water can't soak into the ground naturally. Water conservation is key.
Conservation will not help. Eventually no matter how conservative you are, the population density will get too high. Maybe conservation might delay for 10, 20, 50 years. But eventually it will run out and you have not solved the problem.
Cardinal Thunder you couldn't be any more correct. It's a harsh realty humans gotta face one day and to think there's people still out there having a butt load of kids. I know of some one living like they are in the baby boom era. This chick online is 29, 30 possibly younger than that and has 10 kids, Clown car for a vagina man.
The problem is the corruption, these neighborhoods are not planned and somebody offer the titles of the land illegaly if they live there(eventually they pay a cheap price for the land). The neighborhoods grow and they don't have any kind of service because they don't exist. The interesting part is that these areas offer cheap housing around Mexico City and help the local economy with cheap workers.
The thing is... The city is almost 400 years old.
Although you can improve things, that's usually done in countries that aren't constantly being corrupt.
@@crazy808ish : Condoms will solve the over population problems, there's too many people to sustain the natural resources, namely water. Not only in Mexico, but around the world, the human species is breeding itself into extinction. That's the problem and the facts.
I like videos like this that show technology being used to improve communities
But maybe we should also think about the places that still need that technology and help solve their problems as well.
@@casual_boredom7195 you can't fix everything at once
@@steyn1775 But we can fix 1 thing at a time per person. As many people, that means many problems solved at least in a relatively quick time.
really...technology only helped mexico to run out of water
@@AnkitSingh-gf1zb Was it designed to help them or just to take the resource?
"Not a single peso is charged for harvesting rainwater" Hope it stays that way. Considering the corruption of politicians, time will come when they will become greedy and start heavily taxing rainwater harvest to line their own pockets
Wait till a tax on Air
@Blackpink Fan_da do you really believe that? I think that if you look around no country is doing much for humans right, just look at the global war on terror, the war on drugs, the chinese and muslims, only you can try to protect yourself
I don't think Mexico is that corrupt. If they would be showing their corruption public if they did that. Corruption in Mexico just taking funds secretly, not charging the hell out of people. Its still democratic and politicians can't do that unless it does through a democratic process.
@@Tolocho933 Hope so. There are governments that tax everything. In my country, our government recently taxed people who use bicycle and they also started taxing online streaming. And now, they are also planning to tax online selling.
Harby Mastopia what a shame what country is this?
They should have kept the lakes. Mexico city would look more beautiful than it is today.
If they would’ve had a circle lake covering the center, and just build around it.
You have to realize that it’s been hundreds of years. It’s not just recently that they started building above the lakes, it’s been like 500 years. I doubt the people 500 years ago saw this coming lmao.
@@jeremiahduran7238 it would've been so beautiful and awesome to see
@@pa0lo0_ i mean the aztecs saw it so
The people from back when the lake was being drained were concerned about flooding.
In the future, I can foresee lots of poorer communities building solar roofs and collecting water to get as self-reliant as possible, to avoid being reliant on city officials who have been failing them for so long!
Don't forget is almost every America. State. Rain water collection is illegal
Pavor, if it’s the cowards way is to invest in their homes and their children’s futures to improve their own water + water & everything else, then I am all for it!
I am also all for engaging with and pressuring local official to be better.
@Pavor How is cowardly to provide for your own needs? If anything you deprive the corrupt officials of tax money and power.
@Pavor Yea. And taking power away from the corrupt leaders of your community helps everyone, no?
Will probably be illegal
love to see these deep dives on cities outside of the us and europe. there are so many lessons to be learned and steps that can still be taken to improve the conditions around the world. education and exposure is a strong first step
what 'deep dive' - oh, i get it.. for a mosquito larvae just need a cup of water that isn't used - math shows this is making less than 0.8% impact on the situation,, that's pretty close to a cup of water
@@phigupot8976 the grass also benefits
30 years ago they said water would be gold, and I just laughed :/ ~ wow, they where right!
I saw a guy say that water would be traded on the markets.
@@mwanikimwaniki6801 Check out Water Tree Dream Tree Family- I consider this quality water and water systems, check it out. Have a wonderful day!
in certain area... not while the world still flood all the time...
Wars over basic necessities will be a thing, and/or massive immigration.
Water would never be gold, do you know why?
Because it would never rain gold only water.
Big fan of these type mini documentary videos, showing the positive impact of people getting together and collaborating
I love seeing smart people help people who need it the most. Instead of just self indulgence. We need more people like this
Informative video! The sinking city situation in Mexico City is also very similar to that of Jakarta.
Central valley of california as well it has dropped about 30-40 feet all ready so it's going to be a lake in the middle of california(or death valley like if they plug san Francisco area ).
New Orleans is sinking for similar reasons.
Manhattan is also sinking
Love how people who grow in a community later try to solve the community's problems!
this is what happens when you educate your children
amazing. thats the stuff the future has to be build upon
I live in Mexico City and I can say this a huge problem here
What is the water source of Mexico City? Do you have dams?
@@wavemaker2077 Yes, in the states tha borders Mexico City
The NGO is called Isla Urbana.
Just in case you couldn't figure out from the narration or the small clips when the brand was presented.
I'm curious about the purification process and how often the device needs upgrades. It'd be cool to also get a better picture of the economics of such a system
Much agreed. We’re seeing during the current crises and in most others a rise of disaster capitalists that offer the only solutions because governments either decide to make it so or lack the leadership and will to benefit society greatly. Please also consider this threat. The only options aren’t always the best long term solutions so that poses a risk of not idealizing such goals.
I would say that putting chlorine is a dumb move, best is reverse osmosis follow through UV light and a cooper coil tube at the end to revitalise the water again...
Ra ...Smart! Have you tried it yourself? Just curious. I haven’t made a water reclamation system myself but I am so excited to!!! Ideally one could source natural spring and use science to make the water the most beneficial to the longevity of ones life on their own terms, but I endorse the spread of useful information to all, we are in the fight against death and threats to such together. Thank you
@@thefrugivoreanimal Why is using chlorine a dumb move? Is it more expensive or just less efficient than reverse osmosis?
@@MWENDA-vv5im less effective AND more expensive. It only kills bacteria, it doesn't remove any contaminants. It should be followed by RO to filter out the contaminants to make it potable. Too much chlorine can cause diseases in the worst case and taste bad in the best case and you don't need chlorine for rain water harvesting because there isn't much bacteria in rain water sliding down the roof. We get untreated water from a nearby river(because it is clean enough for most purposes other than drinking) and we use a gravity RO which doesn't even use energy and just clean the filters every month and replace them every two years and they're cheap, 20usd to replace. However you may need to add chlorine if your water comes from a stagnant lake.
Fixing the watershed would help in alot of those cases.
+
It'll never happen sadly
the mayor wants to get water from rivers
Start harvesting the rainwater instead of overworking the aquifer? Smart!
It's beautiful when it's rains in Mexico.
yeah it rains tears of sadness on the history of colonization and inequality as to why most Mexicans live in poverty
I will never forget the drought that happend in my country,it went on for about 4 or 5 years and over time all the rivers,dams,lakes etc eventually dried up and there were only 100 days left for us with water until it was all gone😢
Where’s this?
@@safwaan5630 South africa
I watched that documentary It was up on here on yt
Sounds like California !
The world needs more people like Enrique. Someone that cares about humanity and go out and do something about it. These are the true legends of society.
not really.....the world needs much more....needs leadership to create a new system, not reform the existing system. the entire system must be done away with so we can achieve real solutions, not bread crumbs like this. we need revolutionary leaders, not tiny little baby crumbs that leave all of the problems in place.
@@jokers7890 What do you propose?
@@cowmoo5596 Making me a multi-billionaire so I can just escape reality and never have to deal with the problems 99.99% of humanity has to.
Gotta figure out a way to get those water
Brooo I saw you in the RTX 3080 video and the tenet movie trailer. Tf is happening lmao
Everywhere I go, I see him
Bruh I see him anywhere
So you have started to follow me,
Just like just a guy without a moustache
Ya think?
It could have been a city famous for its rivers and getting wealthy through tourism. Instead, it is this.
It’ll always be this Mexico is trash the government is beyond corrupt
I think Melbourne recovered it’s river if I’m not wrong, perhaps in the future Mexico City can do it as well only that they need a lot of planning and investment
Yeah thanks to colonizers
@@WLFGNGPHNX If it weren't for colonizers there wouldn't be tourism to Mexico in the first place. 😐
well, maybe the spianards didn't think about tourism 500 years ago lol
And yet collecting rainwater is illegal in many American states.
Legal in South Carolina. I'm setting up a collection system, and there's a creek running along the bottom of my property. I do have city water, but I don't have to use it to water the lawn, etc. When the house is complete, I'll be flushing the toilets with rainwater. I don't live in a blue control freak state.
Really? Which ones?
And what of it?
RIP Axolotls. Such an amazing creature that is only found in the drying lake under Mexico City
In Xochimilco still living a remain group of axolotes and in some biological research centers, it isn't over at all bud
Yo vivo en una zona donde cae poca agua, ahora que es temporada de lluvias he recolectado mucha agua en mi tinaco ya solo lo desinfecto con cloro, hay que aprender a sobrevivir amigos
Ironic that they still have so many fountains
seven henson we have water but most of it goes to waste, it is handled very poorly
How is this ironic? The first 40 seconds of this video says exactly that this is mainly an issue for low-income parts of the city. Talking about fountains that are in the richer parts of the city is pointless.
@@davidanalyst671 no, its a signal of income inequality AND corruption
I love how relevant this is given theat my parents would often take us to visit family in Mexico City. Enrique, I love your shirt! How do the rest of get one to in support of the cause?
We need this in my hometown in mexico Oax,Ayoquesco de aldama... when I whent to visit. I opened the hose bin and noticed there was no water!!!! Later on my aunt told my water came once a week... and only in the after noon like at 6 or 7 PM. My visit was 2018
No, acid rain due to air pollution ameks water purification immpossible
I was in Mexico City last weekend. and I wondered why the houses all had water systems on the roof. I already have my answer
Anyone else just feel like chugging a bottle of water after watching?
nah, I went outside, took e hose pipe and washed my paving. I hate sweeping.
Just to flex xD
CDMX Is my favorite city. I hope they are able to quell this problem and Improve the quality for all.
That’s awesome I’m sure the system is not perfect but nothing is This seems like a reasonable and affordable solution
really proud of what the guy is doing!!
the problem of collecting rain water, is that you dont allow the aquipher to fill. Thats a problem germany faced years ago, not by collecting the rain water, but in cities were every square meter is covered in pavement, the aquiphers were depleted. So they opted to make patched of just dirtor gandens in low parts in the city, as a collector, allowing the underground water to recover
It rains a lot there, it just makes sense to harvest rain water. It is a very rainy and green city, but most of the rainwater goes down the sewer. I lived there for many years.
Wow! What a beautiful city with an unfortunate crisis that is happening all around the world. Hope we all together work to solve this issue.
How about you lower the land demand, lower impenetrable land (concrete), increase water penetrable land area (soil), and allow the aquifer to recharge water again?
exactly what I'm thinking..this is just innovative bandaid..doesn't solve the water and sinking entirely, with more structures built on top and more water pumped out
Yup the water eventually finds its way to the aquifer the same way the original water did while being filtered.
@@seanthe100
How filter though. Considering a city of that size with industrial, construction and residential waste on the ground.
your point is correct.....the only real solutions require large scale investments in public infrastructure....not more small scale privatization.
In the US, there are actually numerous local ordinances prohibiting rainwater harvesting. It started way back in the malaria fight against the mosquito in our cities 100 years ago.
This story is so similar to the story of Bangalore, India. It was a city full of lakes, the thirst for more development and corruption has made most of the lake vanish and the remaing have become pure filth. Its the same everyone here drinks bottled or RO water. The water table has depleted drastically. Thanks for sharing, it shows how it can be looked into and solved.
I’m less amazed with the engineering and more infuriated by the corruption. Disease and death weren’t the worst thing brought by the Spanish. Their politics were.
This guy should also be consulted on how to handle waste and sewage. He is very effective.
Beautifully constructed thank you for showing us how we can harvest and protect our water resources. Wonderful video 💕
I have lived in the suburbs of Mexico City my whole life. I was fortunate to live in a home with tap water but water shortages were common and therefore most homes had secondary water storages. Those were used when there were cuts to the water supply, some times for weeks, and also for the times when there was water supply but the pressure was so low that it didn't reach the storage on the top of the house. Water trucks were a common sight. That has been happening for decades.
Hi I'm from são Paulo and this is amazing. Let's use the nature not destroy she.
This is great 👍 love people thinking 💭 out of the box and finding solutions to problems 😄
Kind of a partial solution, as more water is not allowed to hit the ground not only does it affect the below ground water table but also there is less water evaporated back in to the clouds to give them water to rain with in the first place. This is a double ended problem, more and more demand and less and less avalible.
Where do you think the Colorado river ends? Well Pasadena now
Yup right along Colorado street
Elizabeth was concerned about water security for future generations even though she faces one every single day. Her selflessness and forward thinking is quite amazing.
Yet she will probably have multiple kids and make the problem worse.
@@pluto8404 No, because she's transgender.
Pluto : your mom should of took your advice
One of the better info-mercials I've seen in a long time. I wish you the best with your product. Volume sales will help bring down the cost and copy cats will help expand the reach of the concept to better alleviate these people's predicament.
unfortunately no.....the privatization of water is the problem itself.....more small scale privatization does not solve anything long term.......the only real solution is large scale investments in public infrastructure.
The pool supplies store should have everything you need.
Most developing countries already collect rainwater but this is on a higher level.
It'ss awesome, and many countries should adopt it.
Sounds like replenishing the aquifers would be more easy than additional plastics boxes that will break and pollute the environment.
It would way more difficult to artificially fill the aquifers, aquifers aren’t lakes under ground, it’s soil saturated in water which take years to naturally replenish. People need water now.
Well, you can't have your cake and eat it too. At least these people are securing one of the most essential resources and can save some money for other things.
I'm inspired to learn more about rain harvest tech and develop a business model around it Ghana.
privatizing rain harvesting is not a solution.....it is the problem itself.....the only solution is to have large investments in public infrastructure...not more privatization.
"You have to do something" that is the root of a ton of our problems right there
5 gallons purified water for 50 cents - brought right at your door - how expensive is that? Collecting rainwater is dangerous, as the neighbor USA contaminates the atmosphere with deadly aluminum-oxide, among other stuff like pesticides.
Thanks 👍👍👍 tha new inspiration for me
Send this video to Egypt because they can’t run of the Nile forever
Though this rainwater harvesting does best where areas get rain but the infrastructure is poor. Egypt gets little rainfall, so this would not work nearly as well.
Egypt may have to think about desalination plants, perhaps powered by solar in the decades to come.
Randeep I was just making a joke but yeah you’re right
@@randeep6346 That's the only way!
Desalination is expensive process
But fortunately Egypt have abundant of Solar energy which is waiting to be harnessed!
Also they will need to change agricultural pattern! Rice is out of questions now!
Sounds like they need to build percolation wells and permeable surfaces
Mexico looks really clean and beautiful! Great idea with rainharvesting!
Ask Venice they are sinking in water
Sea water
Yes almost every single mega-city in the world lacks urban planning and faces huge problems like this. New Orleans is sinking too. Much of Florida and the East coast of the U.S. will be under water in 100 years.
Why not line the Volcan Xaltepec crater with plastic and let it fill up with rain? It’s high enough to provide pressure and could supple the entire east side of Mexico City? Would be so cheap
Looooove the initiative. Did not know Mexico city had so much rainfall....
such a simple way to make so many lives better, amazing work
Uuuuh, why aren’t we implementing things like this in Flint, MI (USA)?
In the mid 2000's the federal government choose between a new airport for the city and to solve the problem with the water supply.... Since then every new government including the current one treat the water infrastructure like a secondary priority.... Since to solve the water problem will benefit mostly poor people and who cares about them.
so what they had access in all water in the world country..... the reason why there are no water in urban since all farming taken them...
Who knew that annihilating a massive lake could lead to a water shortage
Half The country is flooded and we're in a water shortage smh
This rainwater harvesting system has a lot of opportunities to help out..
plus they will need an amazing filtering
you're right, after 5 years, 0.8% only ..give them let's see about 90 more years -
@@zevvxn guess you don't know much about bloomberg..
The spirts of the Aztec having their revenge
Setting up tanks to collect rain water does not cost much. The main problem is the lack of support from the government. Rain is free especially when a country gets plenty of rain they can find ways to harvest the rain water. Living in Southwest Florida I collect rain water when we get good downpour. My plants love it more than the tap water. 72% of a human body contains water. 72% of this earth contains water (ocean, lakes, etc). Water is a very important source.
Such a great concept. Im amazed by the simplicity and effetivness.
Amazing that climate change and irregularities/draughts caused by it are not even mentioned in this coverage. The slowing down of the jet stream causes unpredictable weather patterns and is the source of much of the displacement of people currently fleeing Central America for places like the US.
Weather patterns were unpredictable before. They will be unpredictable in the future, just got to go with the flow and embrace the change. Life isnt always easy.
@@pluto8404 yes, or try to solve a problem we can actually solve. You don't put a stick in your bike's wheel and then say "ho yeah sometimes my bike as problems, I just gotta change wheel"
wrong man can't change the weather just look at mars.
@@guerillachan20 lol
Fase Any more idiotic statements to make?
It's baffling to me that people there haven't done this themselves already, I mean.. water comes from the sky, you don't have water, duh? It's not like we're talking about electricity here, its water you actually need it to survive, do people not get that? It's just strange to me.
The video mischaracterizes the rainfall in Mexico City. It gets almost all its rain in the rainy season and very little the rest of the year. So individual rainwater harvesting is a bad solution - you need something like a big reservoir or a lake that can average out over the year better.
Well, you must be quite stupid to think people are that stupid. People in Mexico in small communities already do that for long time since water has become scarce, nothing of what this guy is doing is new, just branded and some design added.
The people that do not have rain water systems do not have them because they did not need them, and houses and buildings were made when more than enough water was available for consumption.
Only in the recent years water has actually been scarce, but incorporating rain water systems (specially underground) into an already existing building is not straightforward. on top of all, the air pollution doesn't help, like in any other big city, rain water already falls contaminated. there is no simple solution
It rains all year, its just that its acidic rain
In Australia you cannot build a new house that doesn't have a rainwater tank
Amazing how things can be screwed up.
11:19 wow what a beautiful kitchen. who needs the latest italian tiles and tens of thousands of pounds for a bunch of cabinets when you have a handful of bricks
if you want to live like dogs, I prefer Italian marble
@@pedroSilesia im a builder and ive built what i bet you could never have. and still im more inclined towards rustic design. less tolerance headache, less maintenance and a nice cozy feeling
pedroSilesia your name is Pedro I’m sure you’re broke
Africa: INVEST
Doesnt rain in africa nearly as much as here
@@xaifer2485 probably, just had to make that joke 😅
all Africa has to do is stop allowing corruption to go unpunished - then Africa can stop being the starving homeless child of the world..
@@phigupot8976 that's super true! But I don't see that happening any time soon
@@phigupot8976 this has to the single most dumb comment ive ever read on youtube
They really need to find away to recharge those aquafers with that rain water.
correct....this would require large scale investments in infrastructure.....something that will not happen for the foreseeable future becuz the entire mexican government is in crises......it would actually be in the U.S. interest to provide the large scale funding in public infrastructure throughout Mexico to address the inequality between the two countries.....the only future the U.S. has is to create a economic block that includes Canada, U.S. and Mexico. if only the mentally backwards ruling class in the U.S. would listen to much more intelligent people such as myself....there might still be a chance to avoid a total collapse and this will cost the U.S. dearly.....it will turn the U.S. into the poverty Mexico has...and Mexicans will basically take over the U.S. as a result (finally some justice for the Mayan people).
Most of those people without water service, at some point invaded land illegally. They’re now demanding services. It rains more in Mexico City than it does in London. Also, there has been a system that pumps millions of gallons into the city from water reservoirs. Its called Cutzamala.
THE SAME THING IS HAPPENING IN SELANGOR, MALAYSIA’S SO-CALLED RICHEST STATE.
Justin Trudeau everything
Especially after james bond film everyones wants to go there
not me, not unless you are going to provide 5 security guards 24/7
@dw mx nope, just up to date on the crime stats per MC policia
@@phigupot8976 yes, but if you don't go around with stuff visible you're gonna be ok, its in certain areas too, not every citizen/tourist has been held at gunpoint or robbed
Like Polanco is ok, Roma is ok, but Tepito or Doctores? Get away from there
@@cherrygum3800 no stuff visible, yo mean total face cover so they can't tell I'm a gringo ,, tks but no tks
@@phigupot8976 oh you know what i'm saying, don't carry your laptop in your hand, put it in a backpack, stuff like that
Jakarta has the same problem. It too is sinking.
There isn't a water shortage, there is an excess of people.
Can learn from China how they rejuvenated Beijing and neighbouring provinces by refilling underground water with the Grand Aqueduct project
IIRC mainland China also built canals to divert water away from other parts of the country to Beijing (under the South-North diversion project I think), & people living in those other parts felt it ironic I think that they weren't allowed to touch the water flowing it those built canals
Who the hell decides to build a city on a lake?
it was strategic so that if there was an invasion from other natives, the bridges could be destroyed so that they would be left trapped outside.
People always thinking they're smarter than others. Stop judging people's decisions(especially when it's an entire country's population) and try to learn instead.
I dont know man probably the mexicas could not find other place to live, so they developed their entire civilization in a lake.
The aztecs
From what I understand Aztecs built around the lake and when the Spanish came they built in the lake
Here in the Philippine capital Metro Manila, it is prohibited to have or use groundwater extraction to prevent ground subsidence. Our water supply comes from 2 privately owned Water Treatment Plant Companies that gets their water from different dams. We also buy bottled water if some don't want chlorinated water or just did not trust tap water for drinking. In our 7 person household typically we pay 10-20 USD a month for our water bill. Only time we experience water supply disruption is during drought or a pipe repair.
In my country, our government uses willows to treat wastewater. Willows cleans water, effectively.
Is planning a working water system truly that difficult? The romans has working water systems thousands of years ago.
they were less corrupt
The Romans didn't have to deal with 20 million people in a single city
@dw mx the aztecs were living i a fucking swamp
I know quite a few areas in the U.S. that could be helped by this as well, including MOST major cities.
Wealthy people in Mexico have access to water and poor people get screwed? No way. I’ve always heard that Mexico had such upstanding politicians...🙄
usually, where there is water truck business there is some kind of cartel controlling it, it's just a type of commodity that's heavily subjected to this kind of things. I hope this guy wont get intimidated into giving up promoting this awesome system. They said the water truck service is government provided but who knows who the contractors are... That's a lot of business he is compromising, I really hope I'm wrong.
Amazing. I hope Bangalore will take some lesson from this... & Devlope something ....
None the less they keep having children since their teenage years. They don't seem willing to wait until they have a career and a decent place to live to make a family.
Building a city on a former lakebed is also great for earthquakes and air pollution.
The city exists only to this day because of the technology it implements.
Thankful that where I live people can use 500 litres a day domestically and were nowhere near running out of water.
Just like the middle class in Mexico City.
Reverse osmosis from the ocean, or large dehumidifiers from the air, come on Mexican civil engineers this is literally your job, or is your government not funding this at all
Both needs huge amounts of electricity.
sharefactor thats what nuclear power plants are for
Clearly the government is not interested in solving the water crisis for the most vulnerable population, they were fine with forcing them into purchasing water from their water trucks... we have a similar issue here in the northeast of Brazil. You guys did an amazing job with your domestic rainfall harvest design and are helping thousands of impoverished people seeking a better quality of life. Well done!
I know that cities are polluted but this is incredible. We have lived from tank water for generations. No chlorination or filtration. And we live in a dry climate. We get 250 to 300 litres per square metre of roof. And we have a small house. But that is sufficient for most domestic use. Other water is used for flushing the outside toilet though. I am amazed how collectively and individually humans can fight themselves into a difficult position. Such is our "intelligence".
I remember having to go on the roof and having to clean the water tank to have clean water.