REGINA -- Saskatchewan Premier Brad Wall calls the federal government's plan to introduce a carbon tax a ransom note and he's renewing his threat to fight it in court.

Ottawa says it will introduce a $10-a-tonne carbon price on any jurisdiction that hasn't done so as early as next spring, but Wall has steadfastly opposed that move.

He says Saskatchewan's economy will be hit harder by the carbon levy because its main industries -- such as agriculture and oil and gas -- are carbon intensive.

He says his province has invested large amounts of money on carbon capture and storage, but isn't getting credit for that in the federal plan.

Environment Minister Catherine McKenna says every penny raised by the federal carbon price system will be returned to the province it came from, with the current plan to give direct rebates to individuals and businesses.

Provinces which enact their own carbon price plan can choose on their own how to spend the revenue.