Australian Climate Change Minister Penny Wong said today it is a big challenge to achieve consensus on a new greenhouse emissions target by 2009.

Wong, who went to Indonesia's Bali island to attend the UN climate change talks last week, told Australian Broadcasting Corporation radio that it was a tough task to get this far and the next step will not be easy.

"People had very different views about how we should meet this challenge of climate change," she was quoted as saying.

"I am very aware that this is a difficult process, but I am very encouraged by the fact that there was a willingness around the table through the small hours of the night... to compromise and to reach an agreement," she said.

Wong said the roadmap agreed to at the talks in Bali will help bring developed and developing nations together to find a new agreement in two years.

She said it is a positive sign that the talks ended with agreement on the roadmap for the next two years.

"This is a good agreement, it is a strong agreement. It lays the groundwork for the next two years of negotiations so that we can find a way through to a comprehensive agreement in 2009," she said.