If we could take a gigantic kettle, the kind you could plug into a power socket, an electric one, and put those 20 billion metric tons of water in it, how much power would you need to have this water evaporated?
Gdybyśmy podłączyli do prądu ogromny czajnik i umieścili w nim te 20 miliardów, ile potrzeba prądu,  by odparować tyle wody?