[bluesdave]

I forgot to mention that methane is also a byproduct of waste recycling (I am talking about household vegetable waste and sewerage). And water. Don't forget water. We are running out of supplies of fresh water. Sewerage recycling can supply at least near drinking quality water - and if you spend extra dollars you can obtain water fit for human consumption. At a minimum, sewerage recycling would supply water for our parks and gardens, thus reducing the strain on our existing town water supply.