Reuters: A new generation of biofuels, meant to be a low-carbon alternative, will on average emit more carbon dioxide than burning gasoline over the next few decades, a study published in Science found on Thursday. Governments and companies are pouring billions of research dollars into advanced fuels made from wood and grass, meant to cut carbon emissions compared with gasoline, and not compete with food as corn-based biofuels do now. But such advanced, “cellulosic” biofuels will …