In Search of Cleaner Coal, Scientists Lace Lake With Toxic Element


Experimental Lakes Area toxicologists study how selenium, a coal-mining by product, moves around the food web.

University of Saskatchewan toxicologist Stephanie Graves is trying to determine how selenium, a naturally occurring element stirred up in large quantities by mining, affects plants and animals in boreal forest environments. (Bartley Kives/CBC)

Exploring What Oil Spills Do to Fresh Water


Keystone Pipeline. The Dakota Access Pipeline. The Trans-Alaska Pipeline System. North America has the largest network of energy pipelines in the world, and unfortunately periodic oil spills from pipelines do occur.