The Australian Greens have formally launched their 2016 campaign with the entire federal Greens party room, former party leaders Bob Brown and Christine Milne, and hundreds of supporters in Melbourne.

"I am so proud to lead this party that has the courage and vision to stand up for what matters," said Greens Leader Richard Di Natale.

"Our 2016 federal election campaign is focused on protecting the climate that sustains our health, our environment and our economy, tackling inequality and charting a better way to deal with today's record levels of global displacement.

National Press Club Address

Beyond the two-party system

Senator Richard Di Natale

Check against delivery

Let me start by acknowledging the Ngunnawal people as traditional owners of the land we gather on today and pay my respects to elders past and present.

I acknowledge their custodianship and enduring relationship with their country.

Greens Leader Richard Di Natale is marking the Queen's Birthday by setting out a 5-step path to allowing Australians to serve as our own heads of state.

"We are a mature, independent, confident nation and it's time to stand on our own two feet " Senator Di Natale said.

"It's on days like today that many Australians remember the failed republic referendum of 1999. The Greens have a clear plan to ensure history doesn't repeat itself.

I am devastated to hear of the horrific news of another violent and senseless shooting in the United States.

Our hearts are with the people of Florida and the LGBTI community.

I extend my deepest condolences for the families and loved ones of those tragically killed or injured.

Violence and hate have no place in our communities and now more than ever we must stand together against these hateful acts.

Richard Di Natale
Leader of the Australian Greens

The Australian Greens have welcomed the election being called today, saying Australians deserve better than the double-disappointment they're getting from the Liberal-National Coalition and Labor.

"Global warming, the unprecedented number of people seeking asylum around the world, inequality, transforming our economy: these are the challenges of our time and it's the Greens who are providing leadership," said Australian Greens Leader Richard Di Natale.

The Australian Greens are deeply saddened by the death of our colleague and friend John Kaye.

Our hearts go out to his partner, Lynne, and his family at this time of deep loss.

It was only three months ago that John stepped back from his duties in the NSW Parliament to undergo treatment for his aggressive illness.