http://phys.org/news/2015-08-milestone-hybrid-artificial-photosynthesis.html A team of researchers at the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory developing a bioinorganic hybrid approach to artificial photosynthesis have achieved another milestone. Having generated quite a buzz with their hybrid system of semiconducting nanowires and bacteria that used electrons to synthesize carbon dioxide into acetate, the team has now developed a hybrid system that produces renewable molecular hydrogen and uses it to synthesize carbon dioxide into methane, the primary constituent of natural gas. via Another milestone in hybrid artificial photosynthesis.