Dirty, dirty hydrogen

You may have read our recent review of the UPP, a portable hydrogen fuel-cell that can charge your phone. After using the UPP for a week, we found it “incredibly heavy… incredibly expensive… and incredibly inconvenient to use”. However, in spite of all its flaws, we still thought it was an exciting example of pioneering green-technology. So we decided to do some digging to work out exactly how [...]

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