Heat Wave: Cooling Our Cities Without Air Conditioning

Humans are increasingly reliant on air conditioning, but its use contributes to global warming. As the world warms and demand rises, how can we make A/C sustainable? In Spain and India, Kal Penn explores two innovative solutions.
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Getting Warmer is Bloomberg's exclusive new show about climate, clean energy and business, anchored by actor and former White House aide Kal Penn.
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[@ncubesays]

I'm from Zimbabwe and I recall correcting someone when I was studying in the US who was making fun of 'mud huts', calling them primitive when in actual fact they have amazing thermal efficiency for the climate they are in. I even gave an example of Eastgate Centre in Harare, the largest shopping mall in the country constructed in the 1990s which naturally cools itself. Unfortunately, I don't think it was enough to convince them otherwise.

[@yengsabio5315]

Crazy, eh! Lots'a love, cheers, & Mabuhay, from tropical Philippines!

[@manmohantiwari6952]

MUD HOUSE ARE THE BEST

[@Zaihanisme]

The white superiority complex stops them from listening to us tropical people

[@sumitbhattacharya4402]

They have to make something very very complicated so that they can patent it and monopolise it so that they can make heavy money from a problem. If solution is too simple than how will these people make money.

[@charlieangkor8649]

They are perpetrators of verbal abuse.

[@sureshruparel8433]

Indian villages often used the clay roof tiles which kept cool inside houses red clay tiles called manglore tiles

[@adiagy9283]

I would love to have those. But.. in America they are extremely expensive 😒

[@sureshruparel8433]

@@adiagy9283 these red clay tiles are seriously saying very dirt cheap in India in facts few plant's closed as no buyers people went for modern one's fancy looking one's these are out dated if I say refrigerator with out power again clay made chek mitti cool sites

[@saurahhsingh9849]

@@adiagy9283 how it can be expensive?

[@adiagy9283]

@@saurahhsingh9849 They are expensive in America. For a medium size roof, the clay tiles might reach about $10,000. Besides, regular houses in America are made out of a wooden frame, and such a roof is too heavy on the body of the house. People don't realize that American income is actually not that high. You see a price in store, when you pay for the item you discover that actually there's extra money getting out of pocket, which is for taxes and depends on the state you live in. Then inflation hit hard here too. No public transportation, and price of gas has raised to over $4/gallon. Which is enourmous if you consider that people depend their lives on cars. You can't have a job if you don't have transportation. Distances are huge in America. We count the distances in hours/days/weeks of travel, depending of destination. I travel to next town by car, and it takes me about 1 hour driving with 130/140 km/hr.

[@prashnaveetprasad8339]

@@saurahhsingh9849 everything cost money in USA, even dying is expensive lol ( funerals)

[@riteshkhandekar05]

I live in India, my grandparents put few layers of limestone powder in the rooftop (it's amazing that they find this solution themselves as they have never went to school, sometimes I wonder how they're so smart). So in summer vacation I went to their house for a few days and it was freaking cool almost like 23°c when the weather was 40°c 🤯

[@zumabbar]

if they weren't that smart, it means they were being attentive and curious. someone else did it, they recognized it, and wondered why.

[@adiagy9283]

How did they do it practically. I'd like to do the same with my house. How did they spread it for it not to be carried away by wind?

[@nunyabusiness3786]

Khandekar you don't need an education to use your intelligence

[@jaytemkar8077]

I am also from India and painting roof with limestone powder is well known and used extensively in India. It's very cheap way to cool the roof. Mud houses painted with cow dung is also very effective in cooling home and used extensively in rural India

[@adiagy9283]

@@jaytemkar8077 How do you do it? Do you mix limestone powder with what? Regular paint? Or some type of gluey substance? Or what?

[@EcoHouseThailand]

Based in Thailand I selected a bright white steel roof as a "fly-roof" (large open space under the roof) a 5m wrap around roof to keep sun off the walls and windows. An open staircase under the fly roof to allow hot air to rise and escape "stack effect ventilation" Walls are bright white and windows are very small mounted up high under the wrap around roof. Double aerated concrete block walls with foil and foam between. Foam also under the floor and in the ceilings. I am able to power my house and EV from home solar.

[@charlieangkor8649]

I use 12 old large pieces of fabric on coathangers on a clothes drying rack with stainless steel pans below them. By the way the stainless steel pans were bought in Cambodia and they regularly rust through and leak. Every time the rags start smelling of mold I wash them. When they dry out and I feel hot, I shower them with water but not too wet.

[@cl7910]

I live in a house with a backyard filled with bushes and trees, while the front yard with mostly concrete. I can literally feel the difference of air and temperature. I can have a relaxing afternoon in the backyard at 12nn - 3pm without air condition even when its 95 degrees Fahrenheit.

[@sleverlight]

Yea cities are filled with concrete nowadays, barely any trees

[@ecoideazventures6417]

Proud to see a bunch of Indian scientists in the forefront of this cooling edge technology!

[@Masood1810]

Us Indians have achieved a lot and I am proud of the contribution on individuals. Sadly, all that talent comes out when such people leave the country. We have a huge brain drain issue, currently in acceleration. No administrations, past or current have done much to slow, stop or reverse this situation. Another point was that USA started funding Trane's idea but India didn't even though such research would benefit Indians the most. There's no future planning, no vision on making India a hub for research rather than only service. There is no guidance - our current government is proactive to initiate disputes about decisions of some king centuries ago, but don't seem to have the time or money for nurturing the talent potential of the common India.

[@Earth098]

He is not an Indian. Judging by the accent, he sounds like an American with an Indian ancestry.

[@naveengokarla9518]

​@@Earth098 he is Indian-american He is both

[@yg2356]

"Back when I was doing my PhD at STANFORD" ... lol, can't help name dropping.

[@toniok.4726]

@@naveengokarla9518 copium

[@sambeaumont395]

This is all very well, great ways to cool the insides of buildings, but we also need to cool the exterior. Less roads, less concrete more nature.

[@Earth098]

This is remarkable. Cooling will be one of the biggest challenges of the world in the future. Please make more of similar content

[@ethantarragano9697]

I fully agree on the fact that we should first reduce our needs of cold air during summer with solutions as suggested in the video, but also by a better insulation. As for making our air conditionning greener we have to develop low carbon energy such as renewables and nuclear energy, change the nature of the refrigerant fluid !!

[@susmita5548]

Thats why mud huts is something many people in India and around the world , are rooting for. Sustainable, and we humans beinga a part of nature, its natural ❤💯

[@makingapoint]

US streets lack trees. As do their houses. trees will greatly improve the temperature arround them.

[@dogegamer3288]

Use drapes and keep them closed in the day. At night open your windows with screens. Works wonders.

[@xdmin67]

It works till night temperature becomes too hot as well.

[@curious_banda]

Clearly someone hasn't lived in 45°C.

[@Ana-mp6my]

In Brazil, some people recycle milk packages by creating a mantle of them and putting it on the ceiling with some space between it and the roof. Idk the specifics of it but I went to a house that had that system in the bedrooms but not on the rest of the rooms and the difference in temperature was stark clear

[@Zaihanisme]

I'm imagining the SkyCool film being applied onto louvres and blinds to passively cool and keep heat out of any window, especially in humid tropical regions where evaporative cooling would just not work. A lot of modern design based on European tastes or temperate climates with giant windows and skylights have been stupidly adopted by architects of equatorial places, making for unnecessary heat gain that ultimately ups the need for air-conditioning.

[@TomTom-xp2jb]

Ever seen Bucky Fuller' idea of natural cooling using cool air intakes at the bottom of any structure and hot air exhaust vents on the top. Very simple concept but very efficient.

[@luis1250]

As an HVAC tech, i can see all of this makes sense, but as anything, there are disadvantages with all this, like the coolers of the market based on water, this works ok only in dry climates where evaporation is easier, and the water consumption is huge. White roofs make sense on only hot climates, you dont wanna use this in the north where they get very hot summers and very cold winters. It will help, but it wont stop air conditioning, we always want 70-75F in our houses.

[@VVayVVard]

Paint isn't really a factor in colder climates. In a cold environment, what you want is insulated walls without any leakage points, double windows, and controlled ventilation. Basically, the types of methods used for soundproofing are excellent for preventing heat loss. Radiative losses are miniscule compared to convective and conductive losses.

[@pallavfarsoiya9906]

Only one solution cannot fit all, as a HVAC engineer myself I am always intrigued by what could be the next future air conditioner as the current technology we are using is already 120 years old. Definitely a lot of room to improve. For now I feel we must look towards net zero buildings and sustainable approach.

[@NACAFarm]

well it makes sense why ACs are painted white.

[@audreydupuy2628]

You're right about some of the disadvantages. However, it's a very American things to only have a 5 degree tolerance window. Almost everywhere else, you just layer and adapt to the temperature. It's only extreme heat or cold that's uncomfortable

[@HeavyMetalorRockfan9]

eh, when power gets expensive you're not gonna have an option for 70-75f Also, we already have paints/pigments that change color based on temperature, layer the super white paints they've created with the "transparent when warm black when cold" paints and you got something that adjusts to temperature

[@QED2222]

Very informative.... hope these solutions reach the common people in India and other countries and are financially viable

[@app8790]

I've lived in mud houses in India which have a g+1 kind of setting with wooden ceiling for the first floor. They don't need much cooling even during the summer.

[@rafitobambito7464]

Plant more trees

[@Rudra-mm1qf]

lol for that you need more land, water, and time.Which isn't cheap!

[@guidosillaste4297]

simply adding rivers and 30-40% tree cover reduces the city temp by 10-15 degrees compared to a brick and morter city.

[@charlieangkor8649]

But next day they are deforested

[@udishomer5852]

Better insulated walls Better insulated windows Reflective roofs Trees Evaporative cooling systems (like at that fish market) Electric cars (fossil fuel engines emit lots of heat and raise the city temperature) Raising temperatures in work places and shopping centers (which are often kept very cold for no reason)

[@phylippezimmermannpaquin2062]

seeing those carts getting an upgrade gives me hope in humanity

[@icyjaam]

we need more research on this, kudos to the community. Love you guys, you guys are doing something which is actually necessary in our society.

[@KejriwalBhakt]

In my Village we used to live in mud houses. It's made up of clay, bamboo (for structural strength), cow dung and we use the leftover of Rice crop. We call it Parali. It's quite cold inside during Summers and warm during winters. Though it needs a lot of maintenance but the maintenance isn't costly.

[@akshatsrivastava8283]

Experts, researchers and engineers have to understand that earthly materials, plants, trees, ways to increase efficiency and reduce energy demands could help solving problems and not the space instruments shielding technologies could help reduce Mother Earth's temperature.

[@sandponics]

Stand under a tree in a forest on a hot day, and it is amazing how much cooler it can be than standing out in the full sun in a desert. Who would have thought that was possible? Not some idiot who spends their entire life in an air conditioned university office, that is for sure.

[@cliffwoodbury5319]

surprised u didn't discuss old desert (iran) technology of higher and lower chiming that allows cool air in and hot air out

[@munzilla]

Dude! If you install solar panels, you save energy and you else get rid of the heat. Nobody mentioned that here...Also didn't mention mud or thermocol!

[@avinashluha188]

Mud House Can be the Next generation house where you Cool feel . Which can be the Alternative against Cement Culture house which are part of climate change.

[@sandponics]

Straw bale houses also work, as do earth ship houses. We only need to use our intelligence and get rid of all politicians, landlords and other money grubbing business owners.

[@tomkelly8827]

Wow, those are really interesting solutions! I love that they use no power to work. I also love the district cooling that is happenening where cool ocean bottom water is circulated through the city just. I know Hawaii is doing a little of that as is Toronto

[@mehrankhan633]

Here in Pakistan, the temperature reaches around 45-50 centigrade during June-July. We usually use calcium carbonate (Chuna) which reflects sunlight and results in decreasing the temperature

[@saschaforeal3009]

how did they make ice in the desert? he just skipped over that part. they didnt have this fancy metal back then

[@brucecox31]

They didn't make ice. They stored ice during the winter and used it in summer.

[@sandponics]

Thanks for making this video. At my house in Western Australia from solar panels on the roof we generate and export five times more electricity than we consume. We have zero air conditioning and the house remains cool on 40 degree C days. As climate change increases and the environment heats up, there are lots of passive systems that can be used to further cool the house if and when needed. It is all a matter of attitude and a willingness to think and continue to learn.

[@islandsunset]

in my city, the energy is mainly produced by thermal power plants and in peak summer days such as now, the energy demand skyrockets because of people's need of AC's. So the authorities came up with ingenious idea to not supply power to commercial players after 7 in the evening and asked them to use generators. This increases the burden on the commercial vendors and we the common people have to pay more. Also, there is the pollution but clearly that isn't the concern for an island city which faces direct threat from climate change and increasing sea level 😅

[@fwefhwe4232]

which city do you live in ??

[@waqasahmed939]

In the UK, between 30-50% of our electricity comes from gas. I've got solar panels on my roof, and intend to add even more. Before getting solar panels personally, I thought we could perhaps use renewables for the entire country but realistically, the solar panels aren't enough. I still need to pull from the grid It'd be cool then if the UK would replace gas with nuclear instead

[@rahulsinghal9050]

Finally an innovation in the cooling industry. I always thought Air Conditioners are not the best product considering the energy used and waste by the system. Really looking forward to see SkyCooler technology more in India at a larger scale

[@rsr789]

Well, it's essentially the basic system that Carrier came up with in 1901. Imagine if the money the world used in war spending over the last 120 since Carrier's invention would have been used to make better technologies, including AC's... we would be so far more advanced than we are now.

[@gabrielherrera5503]

Spent the first 2 minutes wondering why I recognized the narrator's voice

[@orc989]

remember children, if a media house has made a documentary about it the company is most likely doing something shady

[@anmolagrawal5358]

I always wonder as to how implementation of ancient wisdom was replaced in the first place if it works better. Is that because of re-emergence of constraints that lead to the necessity and relevance of such solutions?

[@keepgoing6430]

Bosch Building uses 3 stage cooling system which reduces the humidity by providing chiller water at dew points - degree .. especially plants near sea .. but office air cons can be controlled by VFD systems ..

[@alanbarrington733]

The Madrid facility uses what’s called in the US southwest swamp coolers. Great in hot, arid climes.

[@GlenVats]

The man laughing 4:52 is just so ❤❤❤❤.

[@Jay-nk6dm]

im so glad we're re-finding these cheaper and less energy intensive solutions, but i just find it funny that for so long we just assumed our ancestors just boiled away in the heat and didnt do anything for thousands of years to try to make temperatures more bearable. maybe they knew something through sheer trial and error about building comfortable places lol

[@savvysue3537]

Execellent, informative video! Thank you, Bloomberg.

[@outtathyme5679]

I installed a light gray roof on my house and it really helped

[@Gordonz1]

I also installed a wind power ventilaiton system on my roof that drew the hot air out of the attic that would have radiated down into the building.

[@GladysBarrer]

When was this filmed? I got a cool bag in Belgium that kept fresh stuff from the market fresh

[@Mohammedijas619]

I was thinking of setting up some mirrors on my roof and now I saw this skycool.... Hope I can buy some now.

[@rick-yo]

Why couldn’t the fish market utilize its HUGE roof and make it a rooftop farm? Generate income and shade the roof from direct light?

[@dreaming_fox163]

because its a common facility, most probably owned by all or the city/state. its not their job, they only know fish.

[@thepeopleplaceandnaturepod8344]

This is an innovative solution! ✨🙌

[@KaliKali-hv9bt]

9:24 bless her and keep her safe. She’s beautiful ❤❤❤❤So glad tech is helping improve lives

[@rky9438]

8:12- is this kolar town from karnataka state? Looks like ammavaripet

[@acbabygirl]

I hope bloomberg does a series regarding the future of cooling

[@djayjp]

Would've been useful if the two technologies mentioned here were compared.

[@himj7156]

Installing solar panel on roof can done the same job cheaply and also provide electricity better than applying new paint

[@yarogrigoriev1609]

Question, what if earth is going back to its normal temp and we are finally getting out of the Ice age?

[@syedaramisha5087]

What is the sheet called that is being used to cool the area?

[@Rajan-tf9kz]

Is skycool film available commercially in India?

[@markschuette3770]

i blame it on the "architects" who care more about looks than function- with no concern of location/sighting/orientation. in much of the sunny usa you will save about 15% of your heating coolling costs by just orienting the long side of the building South. then there is placing most glass on the south side, plus adding moveable window insulation systems to every section of glass. more insulation is needed as well and shading via plants on the north, east and west sides. and more simple things like ventilation.

[@rawraj1578]

Those thermal blankets we see them use in rescue operations That would work the same and its dirt cheap.

[@thawhiteazn]

Kal Penn has such a great voice for this.

[@faheemhind]

Thanks.

[@ArtDocHound]

Thanks to the corporate partners.

[@stephanieellison7834]

Plant Trees!! August 12, 2022 The more trees who die, the less oxygen you will have, and the hotter the temperatures will be because there will not be leaf coverage to cover over the height of human habitation to reduce temperatures. You must remember that unlike trees, man-made objects, like metal boxes to cars to buildings, absorb solar energy and release it as heat into the air. It is not just the gases from combustion and the heat from hot motors (petroleum and HVAC motors), but ALSO the heat-radiating characteristic of man-made object surfaces that raise the temperature of the air. A great example of this are cars and trucks standing outside in the sunlight. How hot is the body surface? What about leaves and branches of a tree - are they hot to the touch?? Whatever solar energy man-made objects absorb, they will radiate it. That includes solar panels. THAT is what is happening right now. You will probably have to disassemble and destroy a lot of heat radiating technologies such as cars, trucks, buildings, AND the blacktop/sidewalk surfaces by deconstituting the elements and returning them to mine sites and reburying them, and put trees back in those places in order to bring temperatures down (and bring in rainfall). It is getting to where trees are treated as ornaments of beauty instead of living beings who provide numerous critical functions while alive - cooling the air at human height by providing shade, providing oxygen, and making rainfall more likely to happen through transpiration of water vapor during photosynthesis. Trees brings rainfall activity, while deserts take it away because there is NOTHING to contribute to the formation of rain clouds, bringing rain. Also, the presence of moisture and trees will narrow down the range of temperature fluctuations that happen over a 24-hour period. Essentially, entire cities act as small deserts, since there is relatively little vegetation/tree coverage. Cities are even worse than deserts in this regard ALSO because of man-made objects' heat-radiating characteristic. What can we do in the meantime? Can we grow trees to cover narrow roads and grow vines that grow leaves during spring to cover the roads overhead ahead of the summer months? Can we build vine structures over the majority of buildings for a similar reason? We have to have a way of bringing temperatures down by removing as many man-made objects from contact with the sun as possible in any way we can. It is ridiculous to see 120+ degree F temperatures. Kuwait is starting to become unliveable because of these temperatures. You'll see the Ethiopian Desert normally hit 122 degrees, and it has hit 140 degrees. Even worse is the Lut Desert in Iran, which see temperatures of nearly 160 degrees! American Meteorological Society claims a reading of about 177 degrees. There, electronics stop working very quickly, and you can only be out of the car for two minutes maximum. ACs in many cars quit working. Shoes melt. Assuming that we have started to take apart the technologies such as cars, vehicles, etc. and started planting trees and covering up buildings and roads to shield them from the sun, how then would we deal with the nature of "green energy?" The fact is, if we carry out these actions, then solar energy could become unreliable for substantial power generation because the vegetation, including trees, would then bring on more periods of rain, which would in turn impact the number of days of availability of full sunshine. It remains to be seen what would be the impact on winds by such vegetation, even if the windmills are built with propellers far above the tree tops because of the potential for the moderation of the Earth's temperature across its surface relative to today's present scenario. We may have to examine what wind conditions were like thousands of years ago through descriptions of such in ancient writings in areas that were not yet deforested. I recognize that this might not resemble the scenario in which we regreen as much of today's deforested areas as possible. This may also have an unseen impact on wind energy as a reliable source of energy. I believe the key is reducing the level of technology we have, which can reduce the impact of mining, drilling, and harvesting on the Earth, as well as remove sources of heat generation as described earlier.

[@rajevnaik6398]

Apart from roof coating, air conditioning systems should use induction/solar heating with adsorption based cooling for getting over all minimum energy consumption. Unfortunately, these type of AC systems are not being given adequate importance by manufacturers and policymakers.

[@VickneswaranSubramaniam]

to distribute medicated camphor derivatives to zones facing persistent heatwave attacks. even under direct sunlight, exposed skin on camphor or alcoholic medicated oils does elevate the senses with relieve, at the same time detours the mind of the experiential expression of the heatwave allowing the self to resume the normal state of thinking all together.

[@tibsyy895]

That Skycool is an awesome tech!

[@mohsinmocnas]

Wow! Would love to have the skycool in Bangladesh

[@gopro444]

🤣🤣🤣

[@davidcantor293]

Reflecting thermal energy back into the atmosphere will only help contribute to the warming issue though...

[@Justmyopinionlol]

Rome has many ancient churches that felt literally cold in July. There was no AC.

[@oophyte]

Can someone explain to me: if Skycool's foil creates energy gradient without net energy input, then how does it not violate 2nd law of thermodynamics?

[@br88dy]

Not in a KZbin comment section

[@CausticLemons7]

The incoming radiation is reflected back at a specific wavelength essentially sending the heat away from the local area. This technology maximizes outgoing infrared radiation and minimizes the absorption of solar radiation.

[@CA-oe1ok]

@@CausticLemons7 Does not answer the question, does it?

[@sumoneskid]

There is a net energy input. I understand it to work like a heat sink. A heat sink works through conduction. Kinetic energy is transferred from an area of high heat to lower heat. A material like this works through radiation. Infrared energy is transferred from a hot medium to an a medium with low infrared energy.

[@kedrednael]

Every material absorbs or reflects specific wavelengths of light. If the material absorbs a certain wavelength of light it can emit it too. We receive most energy, from the sun, in the form of visible light. This is the light wavelengths you get if something is 5000° Celsius hot. This light can either get reflected or absorbed. Dark objects absorb visible light better than white/ reflective objects. So dark objects gain more energy from sunlight (heat up more), while white objects reflect that energy more (don't heat up as much). Objects on earth are around 20° celsius hot. This means they emit light at infrared wavelengths if they are able to absorb those wavelengths of light. If you want to get a material that keeps cool easily outside, you'd choose a material that reflects the visible light, but emits infrared light. It kinda ignores the sun, while it can loose its heat quite well. No energy is created or deleted, entropy still goes down overall. The energy just goes back to space better.

[@koiyujo1543]

I've been hearing about Skycool off from many content creators for months. The technology they have is absolutely incredible and the way how it works it's just amazing

[@kanwar061]

Nice that thin film has huge potential in india but it need durablity more then 5+year to justify its cost

[@varungk3388]

Does skykool sell in India.

[@sakalasiva]

First you keep vehicle in shades and then you have added a roof to the cart definitely it will reduce the temperature. You need to test it when shade is not available and hot sun rays coming from an angle than vertical then efficiency of this product needs to be tested

[@akhild69]

Can this film be applied on Glass facade to reduce air conditioning requirements

[@grantm6933]

Presumably Skycool's foil could be deployed in a form of roof-top heat pump?

[@AlanPeery]

In conjunction with. Rather than just running off of the air, by hooking to a radiative panel that is cooler than the air temp you get savings when cooling is needed.

[@dominicdelacruz1563]

@@AlanPeery So like a water source heat pump with condenser water loop using the skycool panel as heat rejection units and the heat rejection purely via radiation? Interested to see how this compares to a condenser water loop connected to a dry air cooler or an adiabatic unit in terms of EER and roof footprint required per kW cooling. 🤔

[@susyqusy45]

Thank you buddy buddy buddy

[@mattyrjackson4261]

3:20 vidéo on food miles please

[@violetsarelavender]

Sometimes I feel that all that heat and humidity is for the plants to grow. Since that balance is off , it's trying to fix itself but we aren't allowing it. So till it achieves that target, nature won't stop. Just because something is old (like an older technology) doesn't make it outdated or primitive. If it's survived long, it probably means it still works. Our ancestors were not dumb. Learn from those lessons. They used naturally available resources and live in harmony with nature.... Not create new problems and solutions that create even more newer problems ...

[@koppisettisunilkumar603]

Reflecting some heat means it will still be in atmosphere . Save Soil is the only, movement which can save us from global warming. plant more trees guys

[@ms.newton2534]

I mean, that’s one way to do it but you could build earthen homes which are more efficient energetically and regulates the temperature within the home even better…

[@juniorcoder5244]

Very innovative .

[@manubhatt3]

They should design a new cart where the distance between the roof and the base(on which vegies are kept) of the cart is very less.

[@manmohantiwari6952]

GREAT IDEAS

[@norvinmenezes1545]

If Skycool can be used for Solar panels, it would be a knockout combination

[@Veenasri_jillella]

Telangana state has started the cool roof policy recently

[@tannukiller6904]

What if we cover with solar panel

[@annking1576]

Why don't cities (or even individuals) build cooling towers aka wind catchers? You could reduce your electricity consumption for a/c. Put them in homes, schools or other even in community buildings for people to cool off if the grid goes down. Look into ancient windcatcher cooling technology. Also, there is the Persian ice house, or how to make ice in the desert.

[@ankonish]

what about the heaters in cold countries like Norway? Don't those harm the environment?

[@johnmarday7872]

Wow, when it's going to be available

[@sathyanarayanlbannikod8979]

Is not it's Reflective material working as heating for others and throwing sun light

[@DaviD-we6hm]

Wait their is a product that will reflect heat & gives cool. Fine but what about amount of resources & CO2 emits while that product was building

[@rmq1631]

79 adverts for a 12 minute video?

[@nunya___]

Nano Cooling. Amazing.

[@WonderDownUnder]

I don't know why when it comes to reverse cycling units on standard homes we don't take advantage of the earth's cooling.. 6 feet down the earth is a constant 24 degrees C, why not on hot days have the outside reverse cycle unit instead of letting all that hot air go into the atmosphere, why not have it run underground through a duct line to cool down to 24 degrees first?

[@ericphantri96734]

Cheapest is use routing hot air through pipe underneath water pool or river then release cool air into cities

[@mr.greengold8236]

Why to reflect the sun light?? Can't it be converted into electricity?

[@kimlibera663]

Modern AC is chipped to only turn on the full gear at 68.

[@jalexand007]

Solar panels and heat pumps should help this problem some. Funny how small villages do this we just need to get big cities on board.

[@Kirnotsarg]

7:18 the drone is visible in the reflection.

[@guff9567]

White subtitles with no background? Really?

[@djayjp]

The KZbin app allows you to change the appearance of subtitles.

[@maari7132]

But still my question is y Bloomberg never reported any news of US bank falldown but we interested in other countries affairs to weaken there businesses and economy