“…Such a large-scale transition may, however, prove difficult where habitat, technology, international trade, culture, affluence or knowledge makes livestock products one of few viable food production methods or an easily accessible dietary option. Livestock farming also has a long and enduring cultural significance (McClure 2015;Holmes 2016;Pitikoe 2017). High levels of meat, egg and dairy consumption are prevalent in many societies and a global shift away from this is currently unlikely, with human populations and demand for animal products increasing globally (Kearney 2010;Westhoek et al 2014).…”