full transcript
From the Ted Talk by Vaitea Cowan: How green hydrogen could end the fossil fuel era
Unscramble the Blue Letters
We won't be able to electrify all of our sectors. And here's why. Let's start with an example from the industrial stcoer. Molecules create the reaction, not electrons. To make steel the old way we first mine iron ore, then burn coal to rvoeme the ogxeyn from the iron mix. Seven to nine percent of our world's CO2 emissions come from this process. It's the coal that provides the molecule, creating the reaction to get rid of the oxygen. Electrons can't do that. But what they can do is power the device that creates green hydrogen. And this clean molecule will create the reaction, attract the oxygen and emit only water in the process. So by changing the process, we can emilinate up to 95 pcreent of our CO2 emissions. And today, major European setel metaacrrunufs are already building geern hydrogen-based steel production processes.
Open Cloze
We won't be able to electrify all of our sectors. And here's why. Let's start with an example from the industrial ______. Molecules create the reaction, not electrons. To make steel the old way we first mine iron ore, then burn coal to ______ the ______ from the iron mix. Seven to nine percent of our world's CO2 emissions come from this process. It's the coal that provides the molecule, creating the reaction to get rid of the oxygen. Electrons can't do that. But what they can do is power the device that creates green hydrogen. And this clean molecule will create the reaction, attract the oxygen and emit only water in the process. So by changing the process, we can _________ up to 95 _______ of our CO2 emissions. And today, major European _____ _____________ are already building _____ hydrogen-based steel production processes.
Solution
- green
- manufacturers
- sector
- steel
- remove
- oxygen
- eliminate
- percent
Original Text
We won't be able to electrify all of our sectors. And here's why. Let's start with an example from the industrial sector. Molecules create the reaction, not electrons. To make steel the old way we first mine iron ore, then burn coal to remove the oxygen from the iron mix. Seven to nine percent of our world's CO2 emissions come from this process. It's the coal that provides the molecule, creating the reaction to get rid of the oxygen. Electrons can't do that. But what they can do is power the device that creates green hydrogen. And this clean molecule will create the reaction, attract the oxygen and emit only water in the process. So by changing the process, we can eliminate up to 95 percent of our CO2 emissions. And today, major European steel manufacturers are already building green hydrogen-based steel production processes.
Frequently Occurring Word Combinations
ngrams of length 2
collocation |
frequency |
green hydrogen |
17 |
fossil fuels |
5 |
green electricity |
3 |
climate change |
2 |
renewable electricity |
2 |
clean molecule |
2 |
making green |
2 |
fuel source |
2 |
mass production |
2 |
ngrams of length 3
collocation |
frequency |
making green hydrogen |
2 |
Important Words
- attract
- building
- burn
- changing
- clean
- coal
- create
- creates
- creating
- device
- electrify
- electrons
- eliminate
- emissions
- emit
- european
- green
- hydrogen
- industrial
- iron
- major
- manufacturers
- mix
- molecule
- molecules
- ore
- oxygen
- percent
- power
- process
- processes
- production
- reaction
- remove
- rid
- sector
- sectors
- start
- steel
- today
- water