Sitting silently surfing [apart from the occasional cough] I came across this story on the BBC News Website about a very sensible farmer. James Hart, a pig farmer in Gloucestershire, was struggling to keep his farm going, and to secure the livelihoods of ten families employed there. But it appears his problem is solved.
By setting up a biogas plant, which turns pig faeces [also chicken and cow dung] into methane and also fertiliser, he is able to utilise a waste product [in every sense!] to produce two useful commodities, and generate income for the farm.
It is efficient, cost-effective, and green. And even removes the nasty smell from the manure. Recycling at its best. Well done Mr Hart.