Climate Change - What Did You Find?

An Exxon company in Canada called Imperial Oil was doing climate change research. In the early 90s, they hired this economics like consultancy and they ran various models of climate change solutions. And it determined that if there was a national tax on all of the carbon emitted across the Canadian economy, this could result in approximate stabilization of CO2 emissions. But Imperial looked specifically at how a policy like this would hurt its tar sands operations. It determined that it would cost them maybe like over $900 million or something.