Ever wonder why 90% of Canada's population is ridiculously close to the US border, though? Canada isn't exactly prime real estate.
A lot of the whole "largest countries in the world" things seem unproportional. Think about it, the 4 largest countries are either mountainous (US and China) or very cold (Russia and Canada, and the US to an extent because Alaska is like 1/4th of its area). Perhaps we should go by arable land?
-Carefully taking sips from the Fire Hose of Knowledge