Canwest News Service: Canada is awash with the world’s most precious commodity, and it’s not oil, gold, potash or uranium. It’s fresh water — an essential element for life on Earth — and a Quebec think-tank says the province should look at shipping it out for big profits. The controversial debate over bulk-exporting water is being revived by the report, which found Quebec could boost its gross annual income by $65 billion by taking advantage of water shortages in other parts of the world. The …