Career
He was one of the earlier researchers trying to elucidate the mechanistic and biochemical details of photosynthesis and plant metabolism. His most notable finding was the discovery of a process whereby unicellular green algae can produce molecular Hydrogen (H2) in the presence of light, and that the precursors were derived from photosynthetic water-splitting. Applications based on his work have led to many efforts to develop H2 as a renewable biofuel.