"Jerry Built" wrote
| 925 million litres per day.
| I wonder how that is estimated.... it's very nearly 1
| cubic kilometre a day, to use units that are easy to
| visualise.

I'm not sure that is easy to visualise, actually.

Could you convert it into journeys to the moon and back, football pitches,
or Waleses, please. We're all familiar with those from their frequent use on
television news.

Owain