Natural Resources Canada is currently looking at the natural gas system to assess the impacts of blending hydrogen into the system. As you can imagine, it's a big network. It will take about three years to understand exactly how much blending can happen, what kinds of retrofits might be required to do that blending, and at what kinds of percentages.
We know that, for example, some pipelines out east accept a higher blend without much retrofit, while some are older pipelines that require a full overhaul to accept hydrogen. It will depend.