There are two things here.
The national inventory report is an annual exercise whereby we measure the emissions reductions from different sectors of the economy and different provinces. That's measurement. There's some modelling, but largely, it's based on hard data.
We have, for example, fugitive emissions in the oil and gas sector, which are harder to measure because they are fugitive emissions by definition. We started using aerial measurements to complement some of the work we've been doing on the inventory. That's one thing.
To answer your question on what the role of carbon pricing is, it's not related to the national inventory report. It's based on analysis looking at different measures and how much they contribute to emissions reductions in Canada.