LETTERS Colone: ‘Microgrid’ Would Use 90% Renewables To the Editor: Dennis Higgins of Otego, once again misstated the content in an early January opinion piece published in this newspaper, which I entitled, “Is a tri-gen municipal microgrid an answer to boosting local energy?” Mr. Higgins is obviously a pretty smart guy, who must know a lot about energy, but struggles with reading the word “biomass.” He said, I “never mentioned” biomass in my original article. For the record, below is…