Can Underwater Turbines Solve Our Energy Problems?

7 dec. 2019
1 693 637 Weergaven

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Writer/Narrator: Brian McManus
Writer: Eli Kintisch (
Editor: Dylan Hennessy/
Animator: Mike Ridolfi (
Sound: Graham Haerther (
Thumbnail: Simon Buckmaster

A great deal of information in this video was found through phone interviews with Simec Atlantis engineers
[1] 4,170 TW is annual US energy production (table 1.1 here) - US wave power potential is ~2000TW, according to this 2011 DOE report
[4] Figure 9.6 and 9.7 on page 82
[7] Page 19
[12] Page 14
[16] Figure 11.2 and 11.3 page 114
[17] Page 154
[18] Page 43
[19] Page 39
[20] Page 17
Thank you to AP Archive for access to their archival footage.

Music by Epidemic Sound:

Sail - Dye O
Lexicon - Marten Moses
Paradigmal Conversation - Marten Moses
Calmly - Dye O
This Life of Ours - David Celeste

Thank you to my patreon supporters: Adam Flohr, Henning Basma, Hank Green, William Leu, Tristan Edwards, Ian Dundore, John & Becki Johnston. Nevin Spoljaric, Jason Clark, Thomas Barth, Johnny MacDonald, Stephen Foland, Alfred Holzheu, Abdulrahman Abdulaziz Binghaith, Brent Higgins, Dexter Appleberry, Alex Pavek, Marko Hirsch, Mikkel Johansen, Hibiyi Mori. Viktor Józsa, Ron Hochsprung

  • Have you watched our new video on Real Science? When we posted it we only had 30k subscribers. Somehow it now has 1.4 million views. Madness

    Real EngineeringReal EngineeringJaar geleden
    • @Adam Pancechowski betz limits Einstines learning curve ban works last 100 years slick how well it re- elects policy.

      Steven LonienSteven Lonien13 uur geleden
    • @Mike Jones hell caught up Einstine said hell of way boil water.even now tripple meltdowns ignorance mandontory is good short term.

      Steven LonienSteven Lonien13 uur geleden
    • @General Winoil discovery impllaced betz limits with leonardo 509 year old design and you can not even see einstines equal and opposite reactions threw big gaps. Betza i corner hover dams that reverce equally in tides magneticaly naturally upside down and sideways equally blocking is 1 releasing is 2 = i big betz boo boo in 1919 to eliminate Einstine infinate winds, tides from reacuring in elections works.right right greasing the elect.

      Steven LonienSteven Lonien13 uur geleden
    • Plug the dino holes grease leaks quick before to late to stop misuse we need only for bearings the magnetic Bearings produceing light speeds bought out in last few elections.they keep spinning

      Steven LonienSteven Lonien14 uur geleden
    • @Soonly Taing Einstine ban of betz limits is key its when oil discoverd eliminates over half the tides and winds values.not fact plus my equal and opposite reaction automatic feathering flat blade radial windmills that reverce equally hoover dams in tides and winds stoped by greasing elections now they have 30 1/2 life left.and you. Mayby.

      Steven LonienSteven Lonien15 uur geleden
  • Hoover dams of folding opposing walls mirroring revercing magneticly instantly in patent office oil election policys in successsion.since 1919 oil bonanza. Scam.

    Steven LonienSteven Lonien2 dagen geleden
  • Study water chemistry of polar ice cap and rebuild melted ice I think pure water or neutral water if salt is used then again problem salt will melt water ok

    Md RiyazMd Riyaz2 dagen geleden
  • Use buoyancy priciple for ship be ecofriendly?????

    Md RiyazMd Riyaz2 dagen geleden
  • Plastic coated turbine or blades ok avoids maintenence and growth and algae ????????? Why paint and oil be ecofriendly

    Md RiyazMd Riyaz2 dagen geleden
  • Ship+ship+ship+back to back ecofriendly?????????

    Md RiyazMd Riyaz2 dagen geleden
  • Ship should be used as much as possible solar, wind ,hydel ,battery, to reduced pollution?????

    Md RiyazMd Riyaz2 dagen geleden
  • Moving ship can generate electricity ????????

    Md RiyazMd Riyaz2 dagen geleden
  • Hypnosis??????

    Md RiyazMd Riyaz2 dagen geleden
  • Tides are always present????

    Md RiyazMd Riyaz2 dagen geleden
  • Psunami can be avoided if under ground turbine for generation of electricity??????????

    Md RiyazMd Riyaz2 dagen geleden
  • My mobile stone throne and connection between tides

    Md RiyazMd Riyaz2 dagen geleden
  • One big problem with using tidal energy is that if 1% of our global power use came from the tide then within 1000 years the earth would stop spinning (according to this stanford paper: )

    Connor McCormickConnor McCormick3 dagen geleden
    • @Real Engineering I was a little suspicious of the "!?" in the Abstract and the frequent grammatical errors. Could you summarize the error(s)? What's weird is that they claim to have put together a website in 1993 about this. So they can't be a freshman. They must be in their late 30s at least.

      Connor McCormickConnor McCormick3 dagen geleden
    • “Stanford paper”. Looks like a 1st years book report. The maths is laughably wrong

      Real EngineeringReal Engineering3 dagen geleden
  • Why not just put boilers on the 🌞???

    Sammy JoelSammy Joel4 dagen geleden
  • If we stop listening to the fear porn, we stop pretending to have an energy problem. Co2 is our friend, we can't even live without it.

    drewtronicsdrewtronics5 dagen geleden
  • "here is to make you less of a dipshit"

    artestichnii filinartestichnii filin6 dagen geleden
  • Sea turbines are more of a sea creature grater than energy provider. Tidal pumps are far better and there one in the pipeline between Dunnet Bay and Sinclair Bay in north Scotland . With the Pentland firth in between to provide the tidal height difference needed. It a system of two float chambers ( one at each end ) and the generating station on land in between . Due to the tidal differences it will provide continuous electricity ,all day every day .

    jeffrey macleanjeffrey maclean7 dagen geleden
  • Nope, been there tried that went broke. Gas and coal is so reliable

    Peter ReadPeter Read7 dagen geleden
  • It would be interesting if these underwater turbines we combined with wind turbines in order to increase generation reletive to the costs of creating a foundation and running lines to your generator.

    Gareth BausGareth Baus12 dagen geleden
  • I'd love to see an updated version of this video for 2021! How as the Scotland install gone? Great, comprehensive video.

    ooglekooglek14 dagen geleden
  • why do the turbines use long blades instead of round propeller blades ?

    Charlson C. KimCharlson C. Kim15 dagen geleden
  • could you talk about OTEC?

    johannes nmjohannes nm15 dagen geleden
  • what the fuck are these ...whale blenders?! no to ocean turbines !!!

    richstarxrichstarx17 dagen geleden
  • Whale Sashimi

    PickledStinkPickledStink19 dagen geleden
  • I say one thing MINESTO. That is how you do it! Check them out, they supply Energy by tidal i Färöarna

    soncriessoncries19 dagen geleden
  • I think the marine mammals would get used to the noise and come closer to the turbines over time and risk hurt themselves. The sonar system would be useless, and as animals come close more frequently the system would shut down the turbines for the safety of the animals which would hinder the electric generation process. Encapsulating the turbine with a cage wouldn't be a good solution as well. That's a hard task indeed.

    wine cheesewine cheese19 dagen geleden
  • Answer: no

    Rasta XdeRasta Xde20 dagen geleden
  • Teaching leonardo when wagon goes ship at sea 500 + years ago ? Funded to between blades is all off limits in betz limits in my image. Truth matters if its ok.k Steven

    Steven LonienSteven Lonien21 dag geleden
  • Anyone who has stood by a seawall next to an inlet, can see the tremendous power in the tide change! It happens 4 times a day without fail! Duh! Sounds like a endless source of power! Cost??? You have got to be kidding me!! How much does it cost to dig coal or oil or uranium --- ALL -- of which harm our environment! But tides don't (climate change, king tides??) They just happen everyday, all we have to do is harvest that energy! Duh! I've even thought of having waves, pump and compress air for energy! Two men, one in australia and one in france were developing air driven engines! Boats could use them like gas stations to run their air driven boats! Talking about eco friendly😁🤷why not?!?

    Toni TouchberryToni Touchberry22 dagen geleden
  • Ok they talk about keeping the animals safe in the ocean then act like current energy sources don’t kill air and land animals 🤔

    HailHail23 dagen geleden
  • Maybe. But also kill a shit load of fish

    Demon Lord GamingDemon Lord Gaming25 dagen geleden
  • I've been saying this for yrs. now; Chevron didn't seem interested when I brought it up while I was working on their IT staff; I'm not sure why since I'm sure there are @ least a few oceanic oil rigs they own

    Robert GreeneRobert Greene26 dagen geleden
  • is this method can we use in ships??

    සෙනුත් හේලිකසෙනුත් හේලික26 dagen geleden
  • Real does not include betz limits phyics law imposed to inflate oil value eliminating Einstines infinate relativity of tides & winds slick

    Steven LonienSteven Lonien27 dagen geleden
  • Hook line and gaps when oil greased betz limits in 1919 to lose 1/2 + new inventions bigger better 100 % coveting all natural currrents with the light speed capacity in electronics of magnetic bearings . Einstines relativity is stonewalled

    Steven LonienSteven Lonien27 dagen geleden
  • We live in cold times on Vimeo Biden’s infrastructure fraudulent bill is mortally wounded with Humongous SUBSIDIES for the stupid Green Deal. Clean (?) INTERMITTENT 17% energies floating on the shity Climate Change Dogma. If there is a systemic deficit in urban mobility, it is Public Mobility! ... which they call “TRANSIT” Without any valid analysis Biden allocates 85 billion to be spent on the Permanent Bankrupted Public Transport Systems (Transit represents less than 5% of daily trips person miles made in the entire nation... In order for the Solar and Wind Intermittent Energies to appear in the graphs, it is added to the Bioenergy and “others” ... otherwise, it would be impossible to include it ... they do the same with all "clean" energies, they stir it up with BIOFUELS, which are nothing other than burning trees, garbage. plastics, in short, everything with a higher CARBON content! ... Just because it sounds “politically correct” to refer to them as BIO-FUELS!!! So WE are paying for the electric automobile's distribution energy grid based on GAS, COAL, AND NUCLEAR !! Since you people are very stupid and lazy to think, much less analyze and do a little basic math ... it is impossible for the Exceptionalistas “Freedom Fighters” citizens of this USA to realize the level of bullshit that prevails on the government!!! For electric cars (Tesla Ford and GM) $ 174 billion equates to an average subsidy for 23’000,000 electric Teslas at $ 7,500 per car. Problem… in the US there are currently 276 million vehicles registered in 2019. That is, this idiot is subsidizing with money from 91.4% of fossil fuel car owner’s tax money to the other 8.4% of electric vehicles hardly the majority of the modes of transportation in 2030. When THE ONLY THING THAT THE ELECTRIC VEHICLES DO not NEED ARE SUBSIDIES ... THEY ARE THE MOST EXPENSIVE CARS TO BUY AND MAINTAIN (TODAY THEY ARE THE BEST POLITICALLY CORRECT! BUSINESS .... Electric vehicles today are for people with higher income ... A feel-good deal, kind of going to church, confess and eat the body of Christ (cannibalism)!!! Just to come out of church feeling purified and in hand with GOD!!! Son ... you are no longer the PROBLEM ... you are THE SOLUTION!!!! (Greta Thunderbird) In this first installment 201 thousand million dollars …GO TO CLIMATE CHANGE Stupidity…. Clean Intelligent Sustainable Economical Energies Intermittent… Bullshit!! Ask yourself, are YOU in an existential CLIMATE CRISIS? We DO have control of the climate planetary knob! We can stop the variability of the planet's climate. And why not...reach the goal of UNCHANGED CLIMATE!

    Estoy Hasta LaMadreEstoy Hasta LaMadreMaand geleden
  • Renewable makes more problems than the rest

    генерал раткогенерал раткоMaand geleden
  • I'd know you were Irish though , An eye sore for local residents , ha ... I've heard that so much in this country ha

    Ethen HuntEthen HuntMaand geleden
  • Patent pending that reverses equally opposing blades that makes walls the open thin halfs easy to screen off fish imaulced presidents are not .got to make oil and nuclear voters happy instead.

    Steven LonienSteven LonienMaand geleden
  • I saw that personel message

    Baby PeanutBaby PeanutMaand geleden
  • The educated creditor presumably confess because school microregionally practise beside a lively brain. roasted, squeamish jasmine

    Danis beydenDanis beydenMaand geleden
  • PLEASE don't use TWh it;s a horrible unit, just use PJ

    Yoav BoazYoav BoazMaand geleden
  • 25 years ago i suggested a funnel system to get free energy from the oceans, an engineer told me it was impossible and i was a fool a couple years later he built a system and took all the credit for the idea. guess he was not smart enough to perfect the design

    traxx314traxx314Maand geleden
  • 10:19 I SAW THAT!

    key2010key2010Maand geleden
  • Block & release 100%

    Steven LonienSteven LonienMaand geleden
  • This is stupid and a distraction. Nothing is free, you emit more CO2 making these things than whatever they can offset over a life time.

    H2oRizH2oRizMaand geleden
    • Exactly. Green energy is a joke

      Siddharth DhanrajSiddharth DhanrajMaand geleden
  • If we wanna fuck up sea life even more then sure it can.

    James WallaceJames WallaceMaand geleden
  • Gm

    K. R.K. R.Maand geleden
  • 👍

    Reymart BaraReymart BaraMaand geleden
  • Isn't it obvious that this would end up shredding marine life, just as above-ground wind turbines kill birds and bats? Dams have already been chastised for spoiling fish habitat. The "green" crowd (and its many fakers) fails to understand that dense energy sources like nuclear are a lot greener (if done right) than turning vast tracts of nature into industrial parks.

    False ProgressFalse ProgressMaand geleden
  • Nuclear energy is the only source that will keep up and scale up to sustain the insatiable need for energy . These science projects are cute and promising. But nuclear power is the only sensible infrastructure for competitive economic growth . Unlimited power unlimited fresh water equals an unbreakable economy.

    mitchell Butlermitchell ButlerMaand geleden
  • Underwater turbines look like whale blenders to me.

    ObserverOfPakledsObserverOfPakleds2 maanden geleden
  • Out of all the possible ways to build a hydroelectric dam, the tidal method has the least potential energy normal hydroelectric dams hold back an artificial lake several thousand feet above sea level. not only are those lakes able to be whatever depth the surrounding mountains allow for, with more depth equaling more water pressure through the turbine, The water can even be captured several times on its long journey to the ocean. When you use the tidal method, you're only able to take advantage of about 4 feet of height difference. When it comes to head pressure, surface area doesn't matter, only depth. You could make the area of captured water larger and add more turbines, but you can't make an individual turbine turn more efficiently just by widening the area. On the other hand, you're not limited by the amount of rain and snowfall since the tides will continue coming in and out all year no matter what.

    Marcel ChagnonMarcel Chagnon2 maanden geleden
  • People are so strange. On the one hand, they laid out a multitude of giant cables for communication through all oceans. But then when it comes to energy production they are like 'meh, don wanna lose this sight. Don wanna have these cables/whatever in my garden'

    Pascal DickhoffPascal Dickhoff2 maanden geleden
  • Is it only possible in the sea ? What about big rivers like the Nile and Congo rivers, they’re deep enough with less marine life and a constant large amount of water flow, for research of maximum capacity, please try one of these rivers,

    Nkya BosiNkya Bosi2 maanden geleden
  • "Tides change 4 times a day..." AGHHHH MY BRAIN!

    ThisCussingGuyThisCussingGuy2 maanden geleden
  • Maintaining the grid in an ocean environment it’s too costly yeah she probably could provide enough power but the grid maintenance and the overall necessity to maintain this particular environment is far far too expensive

    IRON60 BITCHIRON60 BITCH2 maanden geleden
  • Rector

    NASA limbuNASA limbu2 maanden geleden
  • 💡 💯

    Shaswot PoudyalShaswot Poudyal2 maanden geleden
  • I’m sitting here thanking that I thought about this over 30 years ago I was on Martha’s Vineyard on a JetSki pulling into a fishing village there was someone standing on the jetty casting his fishing rod I asked him to stop for just one minute so I use used him as a marker I pulled Right next to him and didn’t move I looked down at my speedometer It said I was moving at 17 miles an hour and I said this is constant in and out 24 seven the power and I was designed these things in my head and never do anything with them we’d walked through stores and my brother would say see that thing there my brother invented that 30 years ago and never did anything with it now if they sell it the ideas in my head alone I’ve seen over 25 things that I designed in my mind and never did a thing with them I have one that I got to get out there because it will save so many lives Anyway day late dollar shot

    AldezAldez2 maanden geleden
  • "Here's a gift to make you less of a dipshit" 13:28

    misto cuddlesmisto cuddles2 maanden geleden
  • Slowing down ocean currents will cause severe problems with weather and global warming They knew that back in the '60s

    Brian KepnerBrian Kepner2 maanden geleden
  • Calling up Ellon musk for fundings

    Ro botRo bot2 maanden geleden
  • this is one of the things why china stealing all the water territories

    Ro botRo bot2 maanden geleden
  • No, only nucleair energy, natural gas, hydroxine energy plants can privide reliable energy! The alternatives can do max 20%.... on a good day! Solar cells under snow, frozen windturbines when one need them most, will always give false “outcomes”, but “brings” a happy few a LOT of money! In Paris accord the shares of fake “solutions” in the rest of the world is in top one percent hands. They “catch” the money in african and Asian nations where they have the word “tax” not even in they’re dictionary’s! They “catch” the EU and USA tax money in taxfree country’s, and they’re Troyan horse climate change is a money laundering scheme for the very rich ONLY! It will never replace traditional processes! Not even close!

    Heinz HekoHeinz Heko2 maanden geleden
  • Pretty cool tho

    James WaterreusJames Waterreus2 maanden geleden
  • Engineer: "We must make the most from tidal energy" Me: "The Engineer sounds Irish to me"

    Talha AhmedTalha Ahmed2 maanden geleden
  • I call it the fish chopper

    Matt BowenMatt Bowen2 maanden geleden
  • Eyeballing this problem, I'd place my bets on an onshore turbine powered by switched compressed air driven by the surging of the water in both directions. The air can be made to keep moving in one direction through the turbine with a simple switching valve and, with suitable barriers in the loop, the corrosive salt water could be kept well away from the machinery.

    Voncha VivaldiVoncha Vivaldi2 maanden geleden
  • Whenever you want to give an example of the catastrophes that illiterate scientists have brought to the world, you should mention wind and hydro power plants. Yes I know they are clean energies but ...! Scientists have been aware of all the basic sciences, but in practice they have used them upside down. Their mistakes have caused them to waste more than half of the world's wealth and destroy beautiful nature. This catastrophe has been going on for more than a hundred years, and unfortunately, they are still proud of them and even preach about these catastrophes. The funniest part is that they are installing wind farms in the seas to take advantage of their 20% efficiency. They still do not know that they have to move wind farms in to the deep of water. They do not know anything about the new clean energy plant method that works based on a new scientific formula in physics. So far they have not heard anything about my new invention from the German Patent Office to be surprised. Yes they do not know anything about start this new green industrial revolution in the world.

    Kambiz FatahiKambiz Fatahi2 maanden geleden
  • The Wind doesn't always blow, and the sun doesn't always shine, but the sea is always moving. 4 changes per day = 24 hour energy, and it is based off of Earth's rotation and the gravitational pull of the moon and has been reliable for millions of years. It doesn't get anymore reliable than that. I had this idea a long time ago. Took em long enough to figure it out. Environmental friendly and can be put underwater so it's not an eye sore. Why this hasn't been a major project yet is beyond me. It is literally everything we are looking for.

    ChromazomeChromazome2 maanden geleden
  • The plant offer jekely ruin because television acromegaly fool without a straight rutabaga. tasty, miscreant impulse

    chicago blackhawkschicago blackhawks2 maanden geleden
  • The fearful fearless mascara karyologically dam because kettledrum covalently identify over a horrible kidney. previous, abject link

    이민재이민재2 maanden geleden
  • Once they get all the underwater turbines in place Oh wait...they're killing to much marine life.

    Soul FlyerSoul Flyer2 maanden geleden
  • Ocean can’t solve our energy problem and never will

  • Using Tesla's patents to have free energy would be one way to SOLVE the energy problems. Tell Uncle Scam to cough 'em up and release this forbidden information.

    Brandon MigliorisiBrandon Migliorisi2 maanden geleden
  • The only energy problem we have is political.

    KelliAnn WinklerKelliAnn Winkler2 maanden geleden
  • 1) By reflecting away 30% of ISR the albedo, which would not exist w/o the atmosphere, makes the earth cooler than it would be without the atmosphere like that reflective panel set on the dash. Remove the atmosphere/GHGs and the earth becomes much like the moon, a barren rock with a 0.1 albedo, 20% more kJ/h, hot^3 on the lit side, cold^3 on the dark. Nikolov, Kramm (U of AK) and UCLA Diviner mission all tacitly agree. 2) the GHG up/down welling, “trapping”/”back” radiating/delaying/intercepting, 100 % efficient, perpetual warming loop requires "extra" energy which according to RGHE theory it gets from 3) the terrestrial surface radiating that "extra" energy as a near ideal .95 emissivity black body which 4) it cannot do because of the non-radiative heat transfer processes of the contiguous atmospheric molecules. 1+2+3+4 = 0 Greenhouse Effect + 0 Greenhouse gas warming + 0 man caused climate change. All science backed up by experiment, the gold standard of classical science.

    Nick SchroederNick Schroeder2 maanden geleden
  • The salty self wessely suspect because cello worrisomely save from a magenta hamburger. quick, tame legal

    Jessie MacJessie Mac3 maanden geleden
  • The dirty intestine gully bomb because detail only jail off a tidy pasta. extra-large extra-small exuberant, uttermost root

    Nicholas MineNicholas Mine3 maanden geleden
  • Imaginen how much power you can make by doing this in countries such as seychelles and maldives

    PHAXILPHAXIL3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden
  • All Natural all natural all natural baby All Natural weather All Natural food All Natural water All Natural sky

    Deez NutsDeez Nuts3 maanden geleden

    rabbit reaperrabbit reaper3 maanden geleden
  • Convertir el agua salada del mar en energia para el futuro contiene salanisacion efextiba para produsir hidrogeno y hoxsigeno en bundansia rinbierten ambos elementos y su producto electrisida gararantisado

    Tito ChannelTito Channel3 maanden geleden
  • meanwhile oil exploration ships are just fucking whales' ears 24/7

    DOPE BEATZ BOY$DOPE BEATZ BOY$3 maanden geleden
  • Anything in the water and restricting natural habitat is a terrible idea i.e. look at what dams have done to the wild salmon and fishing industry.

    Eric TEric T3 maanden geleden
  • Is it just me or are we kinda at a point now where we say fk the ecosystem install as much of this as fast as possible because if not we will destroy the entire planet and all ecosystems everywhere... It's just about irreversible so now is the time... they've shown to have low impact and that's good enough make 50 million of these things and let's get the show on the road.

    Andre fruthAndre fruth3 maanden geleden
  • Another good thing abt water energy is that huge shit Is ez to move by ship

    Matthew NiedbalaMatthew Niedbala3 maanden geleden
  • Living the way God wants us to live , as laid out in the Bible, would solve all mans problems.

    Keith HarleyKeith Harley3 maanden geleden
  • You missed Bear River Tidal system in Nova Scotia Canada 🇨🇦

    Mike RedmondMike Redmond3 maanden geleden
  • Of course, it can't

    hidetsuhidetsu3 maanden geleden
  • If you've ever gone scuba diving, you know about barnacles, corrosion, animals, mechanical failure, difficulty of repair... I don't see hope for any any such project.

    Rich CookRich Cook3 maanden geleden
  • These kinds of channels are more valuable than gold.. or even diamonds.. or even artificial cat girls!!

    Saku HaapakkaSaku Haapakka3 maanden geleden
  • Possible for volcanoes to be tapped?

    tkh1001tkh10013 maanden geleden