Labor to consider 40% emissions cut, but no policy yet

LABOR has promised to consider cutting carbon emissions by between 40% and 60%, but has not yet finalised its climate change policy.

Following the government's announcement on Tuesday that it aimed to reduce emissions by 26% from 2005 levels by 2030, Opposition environment spokesman Mark Butler criticised that target on Wednesday as inadequate.

"The benchmark for us is the commitment that our generation has made to our children and our grandchildren's generation," he said in Canberra.

"We must keep global warming to no more than two degrees."

Mr Butler said the Opposition was considering the Climate Change Authority's recommendation of an emissions reduction target of between 40% and 60%.

Opposition Leader Bill Shorten took aim at the government's target, saying Mr Abbott had refused to release the modelling behind the policy's aims.

He said Labor would release its carbon figure before the next election and he planned to attend the Paris talks in December, when new targets would be set.

Mr Shorten challenged Mr Abbott to "lead" by attending the conference. The government plans to send Foreign Minister Julie Bishop to head Australia's delegation.