@Merry Andrew,
												Andrew & Tai
That was a cartoon from yesterday's Age newspaper (Melbourne, Oz).
With the continuing (never ending?) drought & water shortages, we are absolutely 
obsessed (!) by what are we going to do if it doesn't rain (
like crazy!) soon?  People are investing in home water tanks, the state government is investing in a huge desalinization plant, there are fueds between the country & city about water being diverted to the city .... you have no idea!
So this cartoon is a tongue in cheek depiction of one of the many, many suggested solutions: The conversion of human urine into drinking water. Pretty nifty invention! 

Glad you enjoyed it. 
Sorry to digress from your topic, edgar, but I couldn't help myself!