Indeed, Kelli Roberts, another researcher at Cornell, told the meeting that, taking all factors into account, growing switchgrass for biochar may do more harm than good.

• 康奈尔大学的另一位研究员凯利罗伯特在会上指出，纵观全局，如果为了获取生物碳而专门种植柳枝稷，的确弊大于利。