Interesting. I googled Denmark. 85 percent, yes 85 percent of the biogas in Denmark is produced from animal poo from intensive farming. It's all about the amount of raw fuel product to make it economical. I. E not govt subsidised thing.
In NZ the greenie won't allow intensive farming (only chickens.)
Good idea, but at this stage probably very uneconomical in NZ.
Am I on the right track?
Of course IFT and James Shaw are probably running the ruler over such things.