Conversation so far:
what is the land use of the canadian shield
The Shield is covered in parts by vast boreal forests in the south that support natural ecosystems as well as a major logging industry.
how much area is the canadian shielf
8,000,000 kilometers squared in area.
where is the canadian shield located
The Canadian Shield stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada; it also extends south into the northern reaches of the United States.
are there a lot of people living in the canadian shield
Human population is sparse, and industrial development is minimal, while mining is prevalent.

Question: what is the geographic extent of the area
Self-contained rewrite: what is the geographic extent of the canadian shield