Published in 2009 by the Centre for Rural Policy Research at Exeter University, this working paper by Hopkins A and Lobley M. A Scientific Review of the Impact of UK Ruminant Livestock on Greenhouse Gas Emissions, CRPR Research Report No. 27. Centre for Rural Policy Research, University of Exeter, UK.

In April 2009 the Environment Agency published this report, research for which was carried out for the Environment Agency by AEA Technology. Key points as follows: 1. GHG emissions from energy generated using biomass are generally, but not always, less than from fossil fuels. 2. Land use change can negate any emission savings. 3. Energy conversion efficiency is an important factor in reducing emissions 4. Emission reductions of several million tonnes of greenhouse gases per year could be achieved by following good practice