Evans, John2015-12-100028-646Xhttp://hdl.handle.net/1885/54535Keywords: carbon dioxide; fossil fuel; methane; air; animal; bovids; greenhouse effect; metabolism; note; Air; Animals; Carbon Dioxide; Fossil Fuels; Greenhouse Effect; Methane; Ruminants 13C labelling; Aerobic methane; Greenhouse effect; Plant emissions200710.1111/j.1469-8137.2007.02114.x2015-12-09