Yes. The challenge is that it is very expensive to measure a plot on the ground and to have them distributed across the country. In order to get an estimate of the entire area, we basically combine ground measurements with remote sensing from aircraft and from satellites, as well as computer models that help us keep track of the millions of pieces of information that we need to combine to arrive at these estimates.
But in principle, what we do is we estimate, for every hector of forest in the managed forest of Canada, its age, its species, its rate of growth and the impacts that affect its ability to grow, whether that's the spruce beetle, the mountain pine beetle, wildfires, thinning or harvesting. We also track the rate of regrowth. Therefore, the carbon balance can be reported and stratified by different sectors.
There's one other important aspect, which is that the harvested wood products that we extract from the forests are going into a wide range of uses. We also have models that keep track of the carbon storage in harvested wood products, whether that's buildings or bioenergy, and we track the substitution benefits, not for reporting purposes, but for the estimation of alternative mitigation strategies.