Are these Crops Sustainable?

With the amount of water that is being captured at the head waters of the Murray Darling Basin one has to question the sustainability of these crops for the Australian Environment. Perhaps Rice should be moved to some of the cane growing areas and grown in the traditional methods utilising rainfall rather than relying on irrigation water.Both crops need large quantities of water for survival and seem inappropriate to me.

Please read the attached article and vote in my new poll.I am interested in your thoughts.