The Massachusetts renewable portfolio standard (RPS) governs how much renewable energy utilities need to include in their energy mix. It’s pretty low right now, at 14%, and rising very slowly. The low ambition in the RPS standards is getting in the way of achieving the state’s own legal requirement to reduce emissions by 80% through 2050. To make matters worse, the administration is considering allowing more “biomass” to be considered a renewable energy source. Translation: burning wood would be considered clean energy. Before you romanticize an evening in front of your fireplace roasting chestnuts, I should point out that we are talking grid-scale power here, burning forests to power our electrical grids. Seems like a step back, doesn’t it? It is — indeed, the climate impact of burning wood is worse than burning coal. Today, I wrote a letter to the state’s Department of Energy Resources advocating against allowing more biomass to be considered renewable.