?url_ver=Z39.88-2004&rft_id=10.1088%2F1748-9326%2F10%2F12%2F125013&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Davis%2C+K.F.&rft.aulast=Davis&rft.aufirst=K.F.&rft.issue=12&rft.volume=10&rft.date=22+December+2015&rft.issn=1748-9326&rft.atitle=Historical+trade-offs+of+livestock%E2%80%99s+environmental+impacts&rft.title=Environmental+Research+Letters&rft.pages=125013&rft.genre=article