Six New Hampshire biomass plants might be in jeopardy of closing after a bill was recently vetoed by Gov. Chris Sununu. The governor said the bill could have cost Granite Staters millions, but plant managers and employees said the plants are in jeopardy if lawmakers don't act. The governor issued the veto in June, saying the veto would not take anything away from the biomass industry. He said the bill would have given the industry an additional $30 million in subsidies, and vetoing it saved ratepayers about $25 million. Plant managers said the veto has already had an impact.