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As climate change accelerates, finding clean alternatives to fossil fuels is more urgent than ever. Social entrepreneur Vaitea Cowan believes green hydrogen is the answer. Watch as she shares her team’s work mass producing electrolyzers — devices that separate water into its molecular components: hydrogen and oxygen — and shows how they could help make…
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Ironically Vague
September 14, 2022 at 6:09 pm
Perpetual motion machine
Ross Girven
September 14, 2022 at 6:23 pm
Why bother with the hydrogen?
Why make electricity to electrolyse water to then burn the hydrogen to make thermal energy?
Just use the electricity directly. It’s more efficient.
If you need to store it I don’t see hydrogen being more efficient than something like pumped water.
mintheman7
September 14, 2022 at 8:51 pm
Because in applications such as commercial flight, batteries can’t achieve the energy density/weight ratio needed.
Ross Girven
September 14, 2022 at 9:52 pm
Changing aviation to hydrogen isn’t going to end the fossil fuel era as the video title suggests.
Granted, you have a point that that is one of the specific scenarios that would benefit from hydrogen, but that is but a fraction of the fossil fuel usage that would benefit more from direct electricity replacement.
Ross Girven
September 14, 2022 at 9:54 pm
Also I think “current” batteries needs to be added.
There is battery tech on the horizon which may be able to achieve the required power to weight ratios.
Solomon Sherfey
September 14, 2022 at 7:09 pm
Nice patronizing talk, but completely glosses over major procedural, efficiency and economic problems associated with the production, storage and distribution of hydrogen. It’s not “all about” green hydrogen, and green hydrogen will not, in any short period of time, bring about the end of fossil fuel. One need only look at the fossil fuel trajectories of Asia and Africa to realize that GLOBAL answers to fossil fuel use and the generation of greenhouse gases lie not in politically favorable “renewable” solutions, but in proven but cravenly avoided reliable sources. Yes, I’m talking about nuclear … just ask France …
George Orwell
September 14, 2022 at 7:24 pm
Use green energy to make electricity, use electricity to make hydrogen (only way to get hydrogen btw) then use the hydrogen to make electricity. People really need to take some physics classes and not be bamboozled into green-whatever. What if we just dyed the coal green before we burned it? Pretty sure that Russia and China and most of Africa and the Middle East don’t give a crap about CO2 emissions.
ThePawcios
September 14, 2022 at 7:29 pm
Green hydrogen is as green as an electricy used for its production. No one see the problem that the most energy is produced by using coal, gas, oil? How those conversions will help us to rid of fossil fuels?
Alea
September 14, 2022 at 7:52 pm
Those who have been unalived trying to spread this technology are rolling in their unmarked graves. This has been being prototypes and implemented on a small scale for 60+ years. This will disrupt the entire fossil fuel industry. I’m both aghast and thrilled to see this on a Ted talk. But do yourselves a favor, look into the history of this technology and the way this has been silenced for almost a century.
MICHEL
September 14, 2022 at 7:56 pm
How much does it cost to build the battery and how much does it cost to use this hydrogen?
OneM4nArmy
September 14, 2022 at 8:17 pm
Turning water into hydrogen requires cheap electricity, but we cant have that when the green movement is shutting down nuclear powerplants that provides cheap electricity.
John Doe
September 14, 2022 at 8:34 pm
Well done Vai!!
Mohammad Fahimi
September 14, 2022 at 8:45 pm
It is more a marketing video than mentioning a novel idea or spreading it. She is just mentioning green hydrogen, but how?
There is now green hydrogen. The efficiency of electrolysis is too low that the current methods can never recover the electricity which is consumed.
Remy Lebeau
September 14, 2022 at 8:46 pm
And you can promote the best and most safest energy tech that we have in the form of nuclear energy. And once fusion becomes reality the sky will be the limit.
oneoflokis
September 14, 2022 at 8:54 pm
I did that experiment at secondary school! 🙂👍
David Veale
September 14, 2022 at 9:16 pm
Hydrogen — like any gas transferred through pipelines, compressor stations, and into tanks (but much worse because it can actually leak *through* steel) is anything but green. Escaped gas readily travels to the upper atmosphere where it eats protective ozone, potentially soaking the planet in harmful UV and destroying most life. Is that “green”?
Yvonne McNamara
September 14, 2022 at 9:58 pm
It’s impossible to end the fossil fuel era , what are you going to build your roads out of ? How are you going to make cars? How you going to paint your homes if you end the consumption of fossil fuels? Think about that.
Ghislain Bugnicourt
September 14, 2022 at 11:33 pm
I’m suspecting a troll, but in doubt I prefer respecting you.
Your argument seems to imply that we can’t change our habits and practies (why not ?) so we can’t stop doing what we’re doing. Yet by definition fossil fuels are limited, so we will have to stop using them whether we want it or not.
TEXT ME@ (𝟗𝟏𝟖) 𝟔𝟏𝟐-𝟎𝟕𝟓𝟔
September 15, 2022 at 1:12 am
👆👆👆👆👆👆👆 FOR EIDL LOAN ASSISTANTS NOW
Britton Price
September 14, 2022 at 10:28 pm
First they should explain why CO2 is bad and I bet they can’t give factual reasons. More CO2=More plant life.
Dawn to Dusk
September 14, 2022 at 10:38 pm
Is she a scientist or a salesperson?
Bruce Bauer
September 14, 2022 at 11:01 pm
What this and ALL other “get rid of fossil fuel” people ignore is that crude oil is the basis of the plastics industry. I don’t know about you, but I wouldn’t care to live in a world without plastics.
Алексей Сериков
September 14, 2022 at 11:15 pm
I am happy to see such a solid fraction of criticism in the comments. We are not with hydrogen not because of its price but because of numerous downsides and impracticality of its usage. It’s so funny to hear, that hydrogen is most energy dense molecule by mass. Yeah, that makes sense, when you’re able to store it as liquid in a rocket fuel tank, but compare a kilogram of gaseous hydrogen coming with a high pressure leak-proof container to a bottle of, say, kerosene… Hydrogen looks impractical at least.
Cdictator
September 14, 2022 at 11:41 pm
Transfer energy from electricity into hydrogen is not 100%. You could lose a significant portion during the transfer process. Just use electricity as the energy form directly…
Daryl Lee
September 15, 2022 at 12:02 am
abit too optimistic
The SuperBike Tour
September 15, 2022 at 12:34 am
TED use to be good but now full of jokers like this woman.
The SuperBike Tour
September 15, 2022 at 12:35 am
2 million cars just emitting water every day in London. What could go wrong!
Tim Wannell
September 15, 2022 at 1:09 am
A great chat from the privileged position out of poverty. Solutions for those below the poverty line people??
TEXT ME@ (𝟗𝟏𝟖) 𝟔𝟏𝟐-𝟎𝟕𝟓𝟔
September 15, 2022 at 1:11 am
👆👆👆👆👆👆 FOR EIDL LOAN ASSISTANTS NOW
Perry Wagle
September 15, 2022 at 2:55 am
And, ugh, people are already blowing up their houses with natural gas.
DKS dexterous
September 15, 2022 at 3:53 am
Wait that’s what i thought when I was in 10th standard 😳
Mr. E. Chemist
September 15, 2022 at 4:54 am
And then there was reality…
Timothy Harper
September 15, 2022 at 5:48 am
We switched to natural gas because it was supposed to be cleaner but the oil industry leaks methane constantly and methane is worse than CO2. Hydrogen also produces a greenhouse effect when leaked. I’m sure it will still have limited applications but the oil industry is pushing it hard because they can make it from methane.
Stogie Smoker
September 15, 2022 at 8:22 am
Gas pipes leak plenty of gas as well.
phonzy
September 15, 2022 at 6:58 am
Climate change isn’t caused by fossil fuels.
When the climate changed 12000 years ago it wasn’t caused by the atmosphere gas content
James George
September 15, 2022 at 7:11 am
It’s time to listen to our 14 years olds.
I think this is perhaps the dumbest things I will hear this week.
Hydrogen is all good on paper. Just imagine how much “green” hydrogen needs to be produced to power one commercial aircraft. The amount of “green” infrastructure needed to generate such large quantities of hydrogen in a realistic period of time is pretty much impossible to scale with your current technology. We barely have hydrogen cars. And she is talking about moving the entire aviation industry to hydrogen.
These people are propaganda pushers for the the overlords who own us all.
Steven Barton
September 15, 2022 at 8:16 am
I couldn’t watch.
She talks in a weird robot voice
Stogie Smoker
September 15, 2022 at 8:19 am
She sounds like Elizabeth Holmes…
Gaming RaiDer
September 15, 2022 at 8:37 am
Dude this idea is older than the idea of the metaverse, I read about this stuff 10 years ago…
Electrolysis and hydrogen are NOT the (singular) solution, very inefficient, very hard to store and transport etc.
Marvel Movies Official
September 15, 2022 at 8:46 am
But waiting for this happen!
replica
September 15, 2022 at 8:50 am
(hydrogen is not practical)
Yourasa121
September 15, 2022 at 8:53 am
Wooooow
Stephen Land
September 15, 2022 at 8:59 am
So, where is all the electricity to create the hydrogen by electrolysis going to come from? Coal/natural gas burning plants/ Nuclear? Dam every river on the planet?
Philipp Bensmann
September 15, 2022 at 9:00 am
🙌🏼💚
Brew Dudes
September 15, 2022 at 9:02 am
🧡
Simon Gross
September 15, 2022 at 9:36 am
How did this get to be a TED talk? I expected better.
Davy Jones
September 15, 2022 at 1:03 pm
Better than a promoter of a company that produces (and would like to sell) devices that she does not explain anything about what them ACTUALLY do to produce who knows what and how much energy? 😕
Isn’t that enough, the emphasis and enthusiasm that she puts about it? 😌
Simon Gross
September 15, 2022 at 1:07 pm
@Davy Jones I’ve seen better advertisements.
Davy Jones
September 15, 2022 at 1:12 pm
I believe you, @Simon Gross, and them probably were advertising of stuff that could also be useful. 😒
Simon Gross
September 15, 2022 at 1:15 pm
@Davy Jones Yes. Like cheese 🙂
Davy Jones
September 15, 2022 at 2:25 pm
Hydrogen makes you the voice of Donald Duck, @Simon Gross, but cholesterol makes you the arteries of Michelangelo’s David. Be careful! 😜
Christophe REHMET
September 15, 2022 at 10:33 am
I am sorry, but we need 1 nuclear power plant just to produce green steel for 1 blast furnace. How it’s possible to do it? It’s almost the same for all the applications you have presented.
katherandefy
September 15, 2022 at 10:50 am
I’ll buy them!
Shashidar S
September 15, 2022 at 12:56 pm
The main issue with Hydrogen is
Its very hard to store for long and its pretty inefficient
Shashidar S
September 15, 2022 at 3:15 pm
@minoraoz ik
The initial investment and the maintenance costs exists
But the energy they can produce over their lifetimes cover their initial cost eventually
minoraoz
September 15, 2022 at 3:20 pm
@Shashidar S That is still far from free.
Shashidar S
September 15, 2022 at 3:54 pm
@minoraoz
Yes yes
But we need to mass manufacture the renewable energy products to make it cheaper
minoraoz
September 15, 2022 at 5:53 pm
@Shashidar S Green hydrogen will not end the fossil fuel era. It is expensive to make and highly inefficient to use as a fuel, or as a source of heat. The pipeline infrastructure can’t be used to transport hydrogen. The only uses for hydrogen are essentially fertilizers, iron industries and then it needs to be produced reliably, locally and in the quantities needed and economically.
Shashidar S
September 15, 2022 at 5:58 pm
@minoraoz yup
Transportation of Hydrogen is very expensive and inefficient
Its better to produce onsite and Transport as electricity
Br Ca
September 15, 2022 at 7:15 pm
The problem with hydrogen is it is extremely reactivate when combined with oxygen. Just ask the passengers aboard the Hindenburg.
Doomed to obscurity
September 15, 2022 at 8:15 pm
Why can’t we use nuclear
BuddyCBuddy
September 15, 2022 at 9:21 pm
meme strip plug plugged into itself
Aaron Vallejo
September 15, 2022 at 10:15 pm
Great presentation showing us our future transition to renewables through green hydrogen! A huge success is that wind and solar PV powered electricity is now cheaper than fossil fuel powered electricity. Exciting. Let’s do this fast and together!
Sid Dsri
September 15, 2022 at 10:53 pm
Amazing thank you.
Oil dies or species 😕
Tanner Sutherlin
September 16, 2022 at 12:35 pm
This is great, the problem is politics though. If we can’t get our governments on board to change policies than it’s all for nothing.
Amir Rahnama
September 16, 2022 at 8:06 pm
Insightful presentation but inclides way too much overselling. Cimate change is a high dimensional problem.
Geodude 2946
September 17, 2022 at 1:33 am
Ah yes, just use water, which is already (sadly) a difficult to come by commodity for many people across the globe as fuel to further destroy the earth! Genius! If only we could use the hydrogen in the AIR.
WestMass Dave
September 17, 2022 at 12:10 pm
She seems very confident but there’s only one problem she’s wrong. 99% of the hydrogen that’s gonna be produced will be fun fossil fuel. We contain the pollution at the source. And move on. It’s not that her answer is wrong. It’s just in complete
TheScarvig
September 17, 2022 at 12:20 pm
this was an interesting talk until it turned into a sales pitch for a specific company….
mrm prm
September 17, 2022 at 4:25 pm
Rising use of Water electrolysis and charging of EV battery will in future start heavy taxation of water and electricity by national and state governments, rise price vs supply dictating cartels for commodities of water and electricity just like how OPEC or GECF cartels have grown for crude oil or natural gas commodities, grow mafia and theft in commodiites of water and electricity, provide the speculative brokers on commodities trading exchanges to book profits on water and electricity, and start fight as well as next World War to grab water and electricity. The high price of FCV and EV are attractive for vehicle loan providers and vehicle insurance providers to earn more interest on vehicle loan and more premium on vehicle insurance. Price of each item that uses water and electricity will go on rising. Currently just 3-4% of commercially produced Hydrogen comes from water electrolysis yet many parts of Earth face scarcity of drinking and farming water like Cape Town, scarcity of food, long lasting wildfires of South California or Australia or South Europe, daily load shedding of considerable duration or frequent power outages that make it impossible to run refrigerator 24 hours per day, shortage of land area needed to build houses that forces homeless to live in slums like Skid Row and Dharavi or in camping van. With rising contribution of water electroysis to make Hydrogen, the already existing scarcities of resources like food, water, land area or housing and electricity on Earth will only worsen further day by day.
Toyota Mirai FCV stores hydrogen in a plastic tank only. The other raw materials used to make that car are steel and aluminium. Unless recycled and reused, the raw materails of steel, aluminium and plastic involve energy intensive process of manufacture which emit CO,CO2 and even perflourocarbons. Natural Gas is the only source of Helium needed to cool and liquify Hydrogen and in other applications. Water supply pipes in buildings are made of plastic only. Utensils used in kitchen are made of steel or plastic mostly. Dont know why they call process using such rawmaterials as green. Humans only raise ruminants like cattle for agriculture, dairy, meat, leather and these ruminants emit Methane.
As long as birth, life and death exist on Earth, Earth will continue to see formation of fossil fuels. Even each human body or resource consumer body has 18.5% mass fraction of Carbon on an average, but that did not stop human population of Earth from nearing 800 crores milestone as of now. Humans forget about CO2 at the time of cutting down trees. Humans travel unwantedly with a car to do a task that can be now done online from home without the need to even travel. How is the carbon in the car fuel responsible for emissions when it was the human who willingly opts to travel to the shop with a car inspite of having the option of doing online shopping from home? Humans have failed to control own population Humans have failed to minimize amount of each resource consumed to make and operate a passenger vehicle per passenger. Problem is not with Carbon in fuel, problem is with how humans are using that fuel.
Hydrogen has a poor energy density per unit volume, is prone to leakage and boil off losses, is tought to cool due to high specific heat capacity. Water is a very poor source of Hydrogen and water electrolysis needs 7.7 times more energy input than Methane pyrolysis. Methane is the richest source of Hydrogen. Solar insolation and wind speed are variable and discontinuous. Each of solar, wind, hydropower, biomass and geothermal have 2 to 3 orders of magnitude times lower surface power densities than those of fossil fuels and nuclear. Energy storage battery has pooe ESOI value and low energy density per unit volume as well as life of battery is also a point of concern. EV and Hydrogen are not the solutions but they are going to make the situation worst.
Miguel Betancourt
September 17, 2022 at 4:51 pm
This is so stupid, only a 14 year old would believe it. Hydrogen is NOT the solution, not with today’s technology
Naya Gügel
September 17, 2022 at 5:34 pm
Awesome! Hydrogene produced with nuclear energy will be the future. It will take too much time and resources to build so many solar panels.
Mac - D Oien
September 18, 2022 at 7:10 am
SmaRT MAN..!
Or..
What about Hydro Electric generation & Hydrogen Ionizers?
Mac - D Oien
September 18, 2022 at 7:14 am
Now don’t we still need that highly portable Ionizers that’s 3-D. PRiNTaBLe?
Experimenting new world
September 18, 2022 at 3:38 am
Nice approach.
Francesco Perich
September 18, 2022 at 9:23 am
She speaks like she’s married to some guy in the hydrogen industry and she’s trying to get me to invest in him, rather than “spreading an idea that’s worth sharing”.
“Green hydrogen” is the exact same thing as normal hydrogen, just produced with “green electricity”. So we now have a problem with the production of electricity rather than hydrogen. If we aren’t investing in this it’s because it requires a fuckton of energy and has a really low efficiency, which we can afford to have only if we have a really cheap source of electricity (e.g. methane, nuclear). So no, “green hydrogen” is not gonna save the planet, nuclear power is.
Rich H
September 18, 2022 at 9:32 am
Hydrogen storage tanks need to be robust to handle the pressures, so this makes those tanks heavy. I dont see hydrogen fueling cars to be very efficient or practical. But i do see hydrogen heating and electrifying our homes to be a very viable possibility.
blakespower
September 18, 2022 at 11:13 am
yes
Invox
September 18, 2022 at 2:53 pm
I really hated she always saying “green hydrogen”. Just Hydrogen would be fine, but I guess she was selling her company Enapter or whatever.
Altough I like the idea of scalling, there is a much easier path:
Hydroginated oil for transports (alredy in production, usable in cars but not mass produced), and Nuclear fusion for industry and household use.
…At least, until we reach Zero Point Energy.
JeffzTube
September 18, 2022 at 3:59 pm
If you do the math, green hydrogen is higher maintenance and requires more technology (therefore money) to use instead of “battery storage” used in conjunction with solar, wind or geothermal.
If you take the time to look, you can find alternatives to plane fuel instead of hydrogen. Many engineers from various companies are working on it. But you won’t hear about it.
Fossil fuel companies are using the media, and all their powerful corporate and government influence to undermine climate change solutions that DO NOT REQUIRE FOSSIL FUELS.
I have a child. I do not want my child living in a world surrounded by compressed gases or explosive fuels. Especially if IT IS NOT NECESSARY. Fossil fuel companies do not care about your community.
Check out YT channels called “Just Have A Think” and “Undecided with Matt Ferrell” to learn more about hydrogen problems, and “Electric Planes” to find out how far battery powered planes are coming.
Small Boat Fishing Channel
September 18, 2022 at 4:29 pm
Where you gonna get the water to do this? Imagine how expensive water will become… all our energy needs coming from our water supplies, waterways and lakes… how long before that is a problem?
Tim Read
September 19, 2022 at 1:59 am
I am all about “green hydrogen” but your telling me we will need electricity to make hydrogen to make electricity?
Steve Arnold
September 21, 2022 at 8:22 am
The pie graph at 1:30 illustrating the ratio of electricity to fossil-fuel (“molecules”) consumption actually points out the reason why hydrogen-as-primary-fuel doesn’t work. Electricity is required to power electrolysis equipment in order to manufacture and pressurize hydrogen in the first place. To replace the 80% dependency on fossil-fuel energy with 80% hydrogen energy, the pie graph must rapidly evolve to reflect 100% availability of electrical energy. Hydrogen power is a downstream form of electric power. If anything, the case for hydrogen-oriented applications is another case for immediate, worldwide transition to modular nuclear reactors.
On a positive note, the world desperately needs an emergency energy conversion in the shipping industry and hydrogen derivatives might be a practical option once terrawatts of electricity are available to power H2 production facilities. Each of the giant, 21,000 TEU container ships burning bunker “asphalt” spews more SOx than about 50,000,000 cars – a mere 15 of them emit more than all the cars in the world combined… Assuming commercial nuclear reactors will be limited to terra firma, the idea of applying clean, hydrogen-based fuel substitutes to the entire shipping industry does sound like a great leap forward ifwhen feasible.