Edit: Thanks for all the answers and the effort to answer this trendy “sciency” question.
In: 3
Hydrogen is a flammable gas.
We don’t have significant natural sources of it where we can just pump it out of the ground like oil. We have to make it.
* Green hydrogen is hydrogen produced in a “green” manner, typically electrolysis of water, using renewable energy. It means the production of it isn’t polluting.
* Pink hydrogen is hydrogen produced with nuclear power. Sometimes it’s also classified as “green”.
* Grey hydrogen is hydrogen produced in a polluting manner, from fossil fuels. By some calculations, it may be even worse than using fossil fuels directly.
* Blue hydrogen is grey hydrogen with emissions capture, which should be somewhat better. But so far it’s mostly a theoretical thing rather than something currently being done, and it still has a negative ecological impact, just not as bad.
The whole issue with hydrogen powered vehicles is that most hydrogen is grey because that’s the cheapest production process. Green hydrogen isn’t efficient to produce and in most cases you’d do better with a battery powered electric car.
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