This is part of the record of the committee. One hundred well-known economists, including some of my own colleagues at Carleton, have signed this letter. That doesn't mean it's correct.
In the world of the textbook, you can shift curves around and get the optimal outcome, but in the real world, it doesn't work that way. There's a whole political economy of taxation, so if you get things wrong, you can add the risk of regulatory capture. There's a large amount of literature on this. I'm not sanguine that just going by textbook economics can fix the problem.
There's a larger problem here. I'll make this very brief. Global warming—climate change, which is real—is a global problem. If Canada, which is not one of the world's major contributors, says we're going to tax ourselves and pollute less, well, guess what. China and India will rub their hands and say, “Super. We can spew more carbon since Canada is doing the work for us.” It makes no sense.