Billings Gazette: They say everything is big in Texas, which is still the major producer of crude oil in the United States. Well, you might say everything is bigger in the Canadian province of Alberta, the site of the fastest-growing oil-extraction project on earth. There, giant shovels scoop up 100 tons of oil-saturated sands in one pass and dump them into 33-foot-high trucks that carry 400 tons. Tens of thousands of workers swarm over billions of dollars’ worth of construction …