" If we want a future in which our energy is safe and secure and sustainable , we shouldn 't be investing in fuel sources that are dirty and dangerous , " says michael brune , executive director of the sierra club .
Carl pope is being replaced by mike brune , formerly of the rainforest action network -- a group much more aligned with the radical demands of the climate science .
卡尔波普正被麦克布伦取代,麦克原属热带雨林行动网络,这个组织与气候科学的根本要求更加一致。
That may not solve america 's unhygienic fuel problem , says mike brune , the executive director of the sierra club .