Do we really need Hydrogen?
I have asked myself this question many times about hydrogen. Some in the Green Sector see Hydrogen as the holy grail and I sometimes just don't get it:
1. Most sources of Hydrogen are dirty
2. It's difficult to compress and therefore transport
3. It does release powerful greenhouse gases when burned
4. And finally there is some analysis that using hydrogen results in oxygen depletion (see link for example).
Before the knives come out, I am not anti hydrogen - just trying to understand what solutions we hope it gives us, I am also a non-scientist so please be gentle with me!
So starting from the top: Do we really need hydrogen, what are we hoping that hydrogen as an energy source would give us?