The moon was a spaceship all along, and it's inhabitants have finally woken up. They say that in order to continue on their travels, they need to take our oceans to create a bubble around their ship (don't ask me why, it makes no sense from my perspective). They say we shouldn't really worry about it, as we still have plenty of water vapour in the atmosphere - more than enough to survive on - but I just don't believe them, and I don't think many others do either.
I've been put in charge of coming up with a damage assessment, but I have no idea where to begin!
There was one final offer they made, before retreating back into their lunar home... they said they also really need gold, and are willing to trade some of our ocean water back to us - 1000 cubic miles of water per metric ton of gold we give them. Perhaps we can pay them off with enough to keep things going, if the situation is too dire, but I have no idea.
Help me, please, I can't afford to lose my job over this...
As people don't seem to understand what I'm asking, I'll clarify:
Is there enough water in the atmosphere for humanity to survive on, if the oceans were stolen?
If not, would we be able to purchase enough with our gold reserves, to survive?