SaskPower is set to launch its carbon-capture-and-storage project this week when it cuts the ribbon Boundary Dam power plant addition.

The project aims to reduce carbon dioxide emissions by one million tonnes annually, which amounts to about 90 per cent of the emissions from the plant near Estevan.

Sierra Club Canada director John Bennett says it's a waste of vital capital that should be invested in conservation, efficiency and renewable energy.

Some of the carbon dioxide will be liquefied and sold to oil companies to help extract more crude from the ground.