RT @mzaraska: Meat consumption is a threat to biodiversity, study shows http://t.co/A4CXgpVXwG http://t.co/AzUj9Qzn4h.  Sourced through Scoop.it from: www.sciencedirect.com

GR:  This is an important key, but there are others that are required.  Population, pollution, land use, and pets come to mind.