Here's one example from the European Commission: http://ipts.jrc.ec.europa.eu/publications/pub.cfm?id=2359 http://ipts.jrc.ec.europa.eu/publications/pub.cfm?id=

Here's one example from the European Commission: http://ipts.jrc.ec.europa.eu/publications/pub.cfm?id=2359 http://ipts.jrc.ec.europa.eu/publications/pub.cfm?id=2359 the tl;dr is that 2% of overall environmental impact in the EU27 could reduced by switching to a Mediterranean style diet (reduced red meat but not 100% non-meat diet). And PNAS have another study which used data covering 66% of the global population: http://www.pnas.org/content/early/2017/11/28/1711889114 http://www.pnas.org/content/early/2017/11/28/1711889114