If Canada were to actually put such targets into law and have policies to meet such targets, 20% and 60% to 70% by 2050 are consistent with the type of level of cuts you need. But the problem is that they cannot be aspirational targets; they must be real targets, where you have real policies set in law. I don't see those, frankly.
You have the Premier of Alberta saying that Alberta is going to have a 14% cut by 2050. How does the Government of Canada jibe with the province with the largest growth of emissions, which is clearly incompatible with the Government of Canada's plan? I don't see how it can work.