Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtainthe best experience, we recommend you use a more up to date browser (or turn off compatibility mode inInternet Explorer). In the meantime, to ensure continued support, we are displaying the site without stylesand JavaScript.AdvertisementEat less meat: UN climate-change report calls for change to human dietYou have full access to this article via your institution.Efforts to curb greenhouse-gas emissions and the impacts of global warming will fall significantly short without drastic...…Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtainthe best experience, we recommend you use a more up to date browser (or turn off compatibility mode inInternet Explorer). In the meantime, to ensure continued support, we are displaying the site without stylesand JavaScript.AdvertisementEat less meat: UN climate-change report calls for change to human dietYou have full access to this article via your institution.Efforts to curb greenhouse-gas emissions and the impacts of global warming will fall significantly short without drastic...WW…