Lastly, although there were lots of ways to save water, Target 140 identified one simple thing: long showers were accounting for 33% of residential water use, so they distributed a million 4-min timers, and got radio stations to play 4-min "shower songs" throughout the morning.
ALT Source: target140.com.au via the Wayback Machine - https://web.archive.org/web/20070830130708/http://www.target140.com.au/Do+you+pass+the+Target+140+tests