Electricity Users group calls for voluntary power conservation campaign

The Electricity Users group, which includes Fonterra, Rio Tinto, and Woolworths, believes it's time for a voluntary power conservation campaign to avoid a forced one that would hit all consumers. It comes as national grid operator Transpower is looking at allowing access to contingency hydro storage, to mitigate possible power shortages, Major Energy Users Group Executive Director Karen Boyes speaks to Lisa Owen.