At this National Press Club I acknowledge the traditional owners of the Canberra region and all the Indigenous people of our nation.

This year will be another milestone in politics for the Australian Greens. The sole balance of power in the Senate and a breakthrough into the House of Representatives are both within reach. Australia's voters are looking for more progressive politics and the stable, experienced leadership which we alone have produced over the past three turbulent years in Canberra.

Australian Greens Leader Bob Brown today launched two new advertisements targeting senate voting as part of the Australian Greens national election campaign.

One advertisement features Senator Brown warning of the danger of Senate deadlock without the Greens to negotiate the passage of legislation between the other parties. The other features four real people who will vote Green in the Senate this election.

A total of three advertisements will screen nationally in the biggest national election advertising campaign by the Greens.

Australian Greens Senators, Bob Brown and Christine Milne are delighted to announce Dr Geoff Couser as the Greens federal candidate for Denison.

Dr Couser comes to the Greens as a staff emergency specialist at the Royal Hobart Hospital and a passionate spokesperson for Tasmania's unique environment.

"Geoff Couser will be a great and true representative for the people of Denison," says Senator Brown.

"Dr Couser will be a strong performer in parliament. He will bring a fair, balanced and sensible voice to a lower house that is dominated by the two old parties,"

Australian Greens Leader Bob Brown said the announcement of a Victorian Integrity and Anti Corruption Commission (VIACC) today emphasised the need for an ICAC at the federal level.

"South Australia and the Commonwealth are now the only jurisdictions without an Independent Anti-Corruption Commission," said Senator Brown.

"In two weeks I will move for the creation of federal ICAC and Integrity Commissioner."

Senator Brown will introduce his comprehensive National Integrity Commissioner Bill to the Senate at the next Parliamentary sitting period.

Australian Greens Leader Bob Brown says the honesty of the coalition's Senate Leader Eric Abetz - who told Hobart ABC radio's Tim Cox this morning that "I think the Howard Government did go overboard" on taxpayer funded advertising - strengthens the Greens' call for legislation to end government self-promotion at public expense.

Australian Greens Leader Bob Brown will move on June 15th to introduce a private Senator's bill to legislate the process for approval of government advertising.

Senator Brown said the Greens would move for standing orders to be suspended to ensure the Accountability for Government Expenditure on Advertising Bill would be debated as soon as possible.

"The Rudd Government's abandonment of their own guidelines demonstrates the need for laws to govern taxpayer funded advertising campaigns," said Senator Brown.

Australian Greens Leader Bob Brown says the multi million dollar campaign to defend the Government's political interest is unacceptable.

"It is up to the Parliament to legislate to prevent this happening," said Senator Brown.

"The Australian Greens challenge both big partes to commit to laws that require a clear public interest test with a legislated independent arbiter before taxpayers' funds are spent in this way.

Senator Brown added that millions of dollars of taxpayers' money is likely to flow to the mining industry as well.