Danish Prime Minister Rasmussen has invited all heads of government to attend the talks in late December, which are aimed at securing a new global treaty to reduce greenhouse gas emissions.

“I will be accepting Prime Minister Rasmussen's invitation and I will be attending the leaders' segment of the Copenhagen conference,” Mr Rudd told reporters in New Delhi at the conclusion of his Indian visit.

He said it was important that as many world leaders as possible attend the pre-Christmas talks to achieve an ambitious outcome.

“The Copenhagen meeting represents a critical moment in international efforts to reach a robust agreement on global action to tackle climate change,” Mr Rudd said.

The Prime Minister used the opportunity of confirming his attendance to resume pressure on the Coalition to pass the Government's emissions trading legislation.

“With only weeks to go, time is running out, time is running out for us all, time is also running out for the planet,” Mr Rudd said.

“We need action for business certainty, we need action for the sake of our children, we need action for the sake of our grandchildren.”

Mr Rudd flies out of India today bound for Singapore where he will attend the APEC summit.

He will return to Australia on Monday.