|Blocks of sulfur, 25 feet tall (credit: Gord McKenna)|
One place where blocking has gone rampant is near the tar sands of Alberta, Canada. As of 2012, oil and gas extraction of sulfur in this region accounted for roughly 1.5 million tons per year of sulfur. At that time, 600,000 tons were being blocked each year. That led one company, called Syncrude, to start building The Great Sulfur Pyramids of Alberta!
|Comparisons, from Southern Fried Science|