According to this article a report has recommended that more famers should house their cows indoors so that they can collect the methane they produce. The report produced by the Land Use Climate Change Group suggests that greenhouse gases could be reduced dramatically if farmers altered the way they farmed. it claims that cows produce around 500 litres of methane every day and that emissions would fall if this were stored. In the longer term this could mean developing a radical approach such as housing cattle indoors so that the emissions can be captured. However, it would seem any plans to do this would be some way off as the technology to capture the gas has not yet been developed.