Kellogg, maker of Pop-Tarts, announced Feb. 14 that it will buy palm oil — an ingredient in Pop-Tarts — only from companies that don't destroy rain forests where palm trees are grown. Andrew Burton/Getty Images hide caption

itoggle caption Andrew Burton/Getty Images

Much of the palm oil imported into the U.S. ends up in snack foods such as cookies, crackers and microwave popcorn. Heather Rousseau/NPR hide caption

itoggle caption Heather Rousseau/NPR

Dunkin' Donuts plans to go green by committing to purchasing all of its palm oil from sustainable sources. Andrew Huff/via Flickr hide caption

itoggle caption Andrew Huff/via Flickr