Biogas Could Heat Homes

A new report by National Grid, which runs Britain's gas pipelines, says green biogas piped directly to heat homes is more efficient than using the gas to generate electricity.

http://news.bbc.co.uk/go/pr/fr/-/1/hi/sci/tech/7862696.stm

The biogas is produced by anaerobic digestion using microbes, or by superheating the waste. Both processs are less polluting than incineration.