Honolulu Star Advertiser State consumer advocate backs biogas plan Honolulu Star Advertiser2019-08-28T21:00:35+00:00 Hawaii Gas Co. said recently it expects to act on plans to integrate biogas from the city’s Honouliuli Wastewater Treatment Plant into its pipeline... State consumer advocate backs biogas planHonolulu Star Advertiser2019-08-28T21:00:35+00:00