Carbon tax cut will cost jobs: Weatherill

South Australian premier Jay Weatherill says the repeal of the carbon tax creates uncertainty for investors and threatens jobs.

He said the Abbott government had left the nation without a credible policy to tackle climate change.

"We believe that climate change is real. We also believe that taking action to address climate change is essential," Mr Weatherill said in a statement.

"The Liberal Party does not."

The most effective way to tackle climate change is through a market-based mechanism which necessarily involves putting a price on carbon, the premier says.