1. Does biogas pose a climate change hazard? Isn't biogas methane, the same gas that is 25 times more potent a greenhouse gas than carbon dioxide?
2. Does biogas scale up? Can we use waste water treatment facilities to treat our food wastes? If so, why wouldn't that be better than trying to do this at the home or community scale.
3. Could biogas be generated IN the kitchen, under the sink for example? Could it be incorporated into new kitchen designs?