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