Feelings gassy- Researchers at the Penn State University have gas. And a lot of it. Late last year they discovered a way to convert carbon dioxide to methane, the main component of natural gas. The key to their discovery was using tiny microorganisms called ‘methanogens’. These creatures produce methane from water and CO2 when zapped with an electrical current. When a fuel cell is built around them, energy can be harnessed. Although the process is still experimental, it can shed light on another source of renewable energy.

http://www.engr.psu.edu/ce/enve/logan/bioenergy/technical_magazines/ES&T_Electromethanogenesis_52009.pdf

http://www.sciencedaily.com/releases/2009/03/090330111257.htm