Jennifer Glass, Associate Professor, Earth and Atmospheric Sciences, Georgia Institute ofTechnologyAs humanity careens into the uncharted waters of the Anthropocene, we seek novel strategies tomodulate the chemistry of our atmosphere. Microorganisms are well-known to produce andconsume greenhouse gases and have had outsized influence on the chemistry of Earth’satmosphere and ocean over the eons. Yet the vast majority of microbial species remainuncultivated, and most microbial proteins, particularly those from marine and subsurfaceenvironments, remain uncharacterized. In this talk, I will highlight our lab’s recent studies thatintegrate environmental omics and laboratory studies of uncultivated marine microbes, including (i)a novel bacterial clade in marine anoxic zones that appear to make their own oxygen from nitricoxide, and (ii) a new type of bacterial proteins from deep subsurface sediments that slow thegrowth of methane hydrate. These studies inform our understanding of how microbes survive incold dark anoxic ecosystems and how microbial proteins could play a role in a green economy