I agree a large advance is still newsworthy, but it's just laziness not to go on to say what that means, ag "giving a really rather good 36% overall" or "despit

I agree a large advance is still newsworthy, but it's just laziness not to go on to say what that means, ag "giving a really rather good 36% overall" or "despite the still-low overall officiency, scientists are optimistic about future progress" etc. Then again how are they even measuring efficiency, is there a theoretical minimum energy required to remove the salt from water?