Thank you, Mr. Chair.
Thank you to all the witnesses for being here today. There's been lots of really interesting testimony.
I'd like to ask my first question of Dr. McKitrick to continue on that line.
You mentioned perhaps some preference of using one economic instrument. You highlighted the price on pollution. You saw that as perhaps the best way of leading to some of these fuels...switching to lower carbon fuels.
In your analysis, what level do we need to see per tonne on greenhouse gases to start encouraging some of that price switching that you'd like to see in the market?