Oregon Dairy Farm in Lancaster County, Pa.
Compost steams from the warmth of biological activity as it gets turned at Oregon Dairy Farm in Lititz, Pa., on May 1, 2015. Oregon Dairy Farm, which composts food waste and cow manure, utilizes cover crops, and powers the entire farm with a methane digester, was named as a 2015 U.S. Dairy Sustainability Award winner. (Photo by Will Parson/Chesapeake Bay Program)