Now being a Yorkshire man I like the idea of something for nothing and renewable energy falls into this category, so I was most impressed to see the following article; http://www.bbc.co.uk/news/science-environment-11468145 Perhaps one day you could use Urine to power your car or are they just taking the p**s?
I've heard of something like this for clean diesels....considering an article of US truckers leaking into any open container and tossing them on the road - it would be progress.
Now there's a fuel source in plentiful supply. Maybe the little batteries should be known as P cells.
I can just picture it. Low on gas have a beer or two and insert penis here, of course there would need to be a lady friendly cup for refueling.
We can use co-gen and closed digesters to turn sewage/manure into methane, to take care of the odour and most of the mess at the same time as we get "free" power I'm all for it. Esxcuse me while I hike a leg