STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
Pig food research. Animal nutritionist adding crude glycerin (the dark liquid) to pig feed for the piglets at right. Crude glycerin, also called glycerol, is a sweet-tasting organic compound produced during biodiesel production. It has been shown to be an excellent source of energy for animals, but processing is needed to remove toxic components.
Model release not available. Property release not required.