what would be cool is if this could be combined with an ethanol production system. So fermentation bacteria produce ethanol, their CO2 biproduct goes straight t

what would be cool is if this could be combined with an ethanol production system. So fermentation bacteria produce ethanol, their CO2 biproduct goes straight to these enzymes, and if somehow their waste product could feed the ethanol. So you could in theory have a "sunlight in, ethanol out" plant that is almost completely neutral. Ethanol isn't great, since combustion engines' efficiency sucks, but it would bridge a gap to reduce carbon while we still rely on combustion engines. Or the ethanol could be used in "cogeneration" facilities that use the waste heat and produce electricity to get very high utilization of energy.