Water -- Description du film [en anglais] :
« A children's film explaining the importance of water in society, and showing how cities are supplied with clean water. »
-- National Film Board of Canada

Source :
NATIONAL FILM BOARD OF CANADA. « NFB -- Water », National Film Board of Canada, http://onf-nfb.gc.ca/en/our-collection/?idfilm=17831. [en anglais]