President Obama at the White House Science Fair

President Barack Obama looks at a piece of a wood-alternative fuel made from biomass waste while touring projects presented at the White House Science Fair in the East Garden of the White House, April 22, 2013. Jon Kubricki, left, and Bridget Zarych, center, of Pinelands Eco Regional High School in Little Egg Harbor, N.J., presented their mini-press that turns biomass waste products into viable wood-alternative fuel for cooking. (Official White House Photo by Pete Souza)