Chart by Nick Edgar, created Sept 21, 2014 using the latest data from Environment Canada's Greenhouse Gas Emissions Reporting Program.
Total emissions: 126.4 metric megatons CO₂ equivalent, or 14.4 kilotons per hour (averaged over whole year).
With a price of carbon of $30 per ton of CO₂ equivalent, the cost would be $432,000 per hour, or ~$3.8 billion for the year.
Alberta's current price is less than $2 per ton, so most of this cost is currently externalized.
Hover over the bars for details, including a breakdown of contributing greenhouse gases (all in CO₂ equivalent).