COVER ART: Livestock manure can be used to produce methane (biogas), which is a renewable energy source. The effluent from this process is often used as a source of water and nutrients for crop production. However, T. L. Veum and coworkers have reported research to determine whether the effluent could be a useful ingredient in swine diets (see J. Anim. Sci. 2015.93:197–208). IMAGE CREDIT: Sarah G. Lupis, Institute for Livestock and the Environment, Colorado State University. Symbols courtesy of the Integration & Application Network (ian.umces.edu/symbols), University of Maryland Center for Environmental Science.