In June 2011, Abbott for the first time led Gillard in a Newspoll as preferred Prime Minister. In September 2011, he announced a plan to develop an agricultural food bowl in the north of Australia by developing dams for irrigation and hydroelectricity. Coalition task force leader Andrew Robb claimed that Australia currently produced enough food for 60 million people, but that the Coalition plan could double this to 120 million people by 2040. The head of the Northern Australia Land and Water Taskforce expressed concerns about the economic and environmental viability of this plan as well as its effects on the indigenous Australian communities in northern Australia.