Australian Greens Deputy Leader, Senator Christine Milne today delivered a clear ultimatum to the Rudd Government and the global community.

"We must do what the climate crisis demands and move to zero emissions fast, or face consequences that cannot be accepted," Senator Milne said.

"The fact is we cannot keep a safe climate and keep burning coal, oil and gas, and logging our forests. One or the other must go.

"That we may be undone by the refusal, for what ever reason, to believe that another world is possible was demonstrated again this week, with Minister Wong saying: 'going further is not possible without causing economic disruption - if it is possible at all.'

"Minister Wong, do you really want "running up the white flag" to be your legacy?"

Senator Milne noted that the Government's climate target would give us a 50-90% chance of breaching 2C warming risk triggering a climate nightmare.

"50 to 90%. Would you put your son or daughter on an aeroplane if you knew that it had a 50-90% chance of crashing? If not, why would you take that risk with the whole planet?"

Senator Milne also set out a positive vision for transforming Australia to a zero emissions powerhouse, creating jobs and improving our well-being as a community.

"Committing to delivering a safe climate means embracing the massive challenge of moving to zero emissions fast, frees you up to unleash human creativity in a wave unlike anything we've seen.

"Just as in 1989 we could not imagine the world of the iPhone and Blackberry, in the next 20 years we can and will create something that now seems impossible."