An interesting new study shows that feeding livestock from grass and by-products from food production could provide sufficient food and reduce environmental impacts of livestock production.
Impacts of feeding less food-competing feedstuffs to livestock on global food system sustainability
Christian Schader, Adrian Muller, Nadia El-Hage Scialabba, Judith Hecht, Anne Isensee, Karl-Heinz Erb, Pete Smith, Harinder P. S. Makkar, Peter Klocke, Florian Leiber, Patrizia Schwegler, Matthias Stolze, Urs Niggli
Published 16 December 2015.DOI: 10.1098/rsif.2015.0891