I don't know the upstream side of it terribly well. That would be best posed to someone in the production side of biogas. For example, Gaz Métro, FortisBC, and some of the other gas utilities are involved in that.
I do know that there are some challenges around reinjection of biogas into the existing natural gas pipeline infrastructure, but I think that's being resolved for the most part at the provincial level, under the utilities commissions in each province.
I think there has been widespread acceptance of biogas and the use of it, so there has not been much opposition. At the federal level, I don't think there have been any regulatory issues with regard to biogas.