Starting with canola seeds, right, cooking oil is yellow. After being used, it turns brown. On the left is a beaker of biodiesel made from the used cooking oil. Pictured Jan. 28.
Starting with canola seeds, right, cooking oil is yellow. After being used, it turns brown. On the left is a beaker of biodiesel made from the used cooking oil. Pictured Jan. 28. pseligson@newsobserver.com
Starting with canola seeds, right, cooking oil is yellow. After being used, it turns brown. On the left is a beaker of biodiesel made from the used cooking oil. Pictured Jan. 28. pseligson@newsobserver.com