Waste equals food. At least that’s what we were taught in ecology class. In the eyes of California’s Bioenergy Interagency Working Group, organic waste equals something a bit more 21st-century: low-carbon biofuels, biogas, and renewable electricity. In its 2012 Bioenergy Action Plan, released on Wednesday, the working group lays out a plan to convert more of the state’s considerable wood, forest, agricultural, food, yard, and animal wastes directly into energy through anaerobic digestion, biomass burning, landfill gas capture, and other technologies.