from H2 and CO2 is thermodynamically favoured under alkaline hydrothermal conditions, so long as oxygen is excluded. That’s remarkable. Under these conditions, between 25 and 125°C, the formation of total cell biomass (amino acids, fatty acids, carbohydrates, nucleotides and so on) from H2 and CO2 is actually exergonic. This means that organic matter should form spontaneously from H2 and CO2 under these conditions. The formation of cells releases energy and increases overall entropy!
