Thank you very much, Mr. Chair, and thank you again to all the witnesses for being here.
Mr. DeMarco, I'd like to follow up with some of the questions I asked in my first round of questioning.
We've established that it's the goal of the federal government to have 80% of its vehicles as zero emission by the end of the decade, and we established that right now we're still in the single digits, as is the general population of the country. I asked a question about the carbon tax, and your answer was that the carbon tax theory is sound.
I would like to go a step beyond that into practice. I wonder if you could help us understand how high the carbon tax has to go before the government starts meeting some of its goals? Are we talking $1 a litre, $2 a litre or $3 a litre in carbon tax before we start achieving some of these targets?