Sure. I'll speak to both of those questions.
On the first one, yes, Canada has been sequestering carbon dioxide underground for many years. Shell's Quest project in Alberta has been up and running since 2018, and I believe it has already sequestered several megatonnes of CO2 underground. Canada has favourable geology in terms of offshore basalt formations on both coasts, as well as depleted oil and gas reservoirs in Alberta, Saskatchewan and B.C.—and possibly off Newfoundland and Labrador as well—to store carbon dioxide. Canada does have the potential to store a lot of CO2 underground.
Second, on the economics, currently blue hydrogen is expensive. It's several times more expensive right now than grey hydrogen, which is hydrogen without carbon capture and storage. However, as technologies improve and costs scale down, I think it will be cost competitive, but again, green hydrogen might be more cost competitive in the next decade.