Aussie PM: Climate deal tough

Reaching a global agreement on climate change is going to be tough, requiring action from both developed and developing nations, Prime Minister Kevin Rudd says.

Mr Rudd expressed concerns during his trip to Europe last week about the likelihood of reaching an agreement at climate change talks in Copenhagen in December.

He told Danish Prime Minister Lars Lokke Rasmussen, who will host the talks, it was unlikely world leaders would reach an agreement on reducing greenhouse gases.

Mr Rudd met climate change guru and former US vice president Al Gore in Sydney on Wednesday to discuss progress ahead of the Copenhagen talks.

"This is going to be a very rough and bumpy road, there are many obstacles in the way," Mr Rudd told reporters after their meeting.

"As I said recently in L'Aquila at the G8 plus meeting in Italy, our negotiators worldwide are going to need fresh political momentum, a fresh mandate in order to land an outcome in Copenhagen.

"We're going to need action from developed countries, we're going to need action from developing countries and we're going to need, of course, someone working out the basis of an appropriate deal for the major economies of the world to get a decent outcome for the planet.

"This is serious stuff, the clock is ticking, there's no time to be wasted, there's now less than 150 days until we reach the meeting in Copenhagen."

- AAP